This is default featured slide 1 title

Go to Blogger edit html and find these sentences.Now replace these sentences with your own descriptions.

This is default featured slide 2 title

Go to Blogger edit html and find these sentences.Now replace these sentences with your own descriptions.

This is default featured slide 3 title

Go to Blogger edit html and find these sentences.Now replace these sentences with your own descriptions.

This is default featured slide 4 title

Go to Blogger edit html and find these sentences.Now replace these sentences with your own descriptions.

This is default featured slide 5 title

Go to Blogger edit html and find these sentences.Now replace these sentences with your own descriptions.

Jumat, 19 Mei 2017

VIDEO ENGLISH NARRATION


THE HISTORY OF ATOM THEORY

What Is ATOM ?
            ATOM is the smallest constituent unit of ordinary matter that has the properties  of a chemical element. Every solid, liquid, gas and plasma is composed of neutral or ionized atoms. Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The  nucleus is made of one or more protons and typically a smilar number of neutrons.
For the first atomic theory timeline, the atomic models has change over time, for atomic models has changed over time. For over two centuries, scientist have ceated different models o9f the atom. As scientists have learned more and more about atoms, the atomic model has changed. Atomic Theory Timeline
Here is a timeline of some of the major ideas


But First, Democritus!
Democritus was a Greek philosopher (470-380B.C.) who is the father of modern atomic thought. He proposed that matter could NOT be divided into smaller pieces forever. He claimed that matter was made of small, hard particles that he called “atomos”


John Dalton – 1808
John Dalton created the very first atomic theory. Dalton viewed atoms as tiny, solid balls. Dalton was an English school teacher who performed many experiments on atoms.
His atomic theory had 4 statements…

Dalton’s Theory

1. Atoms are tiny, invisible particles.

2. Atoms of one element are all the same.

3. Atoms of different elements are different.

4. Compounds form by combining atoms.

J.J. Thomson (1897)
J.J. Thomson discovered electrons. He also proposed the existence of a (+) particle His atomic model was known as the “raisin bun model” He was the first scientist to show that the atom was made of even smaller things. Thomson’s Model Atoms are made mostly out of (+) charged material, like dough in a bun. The (-) charged electrons aren found inside the (+) dough.

Ernest Rutherford (1911)
Rutherford discovered protons and the nucleus. He showed that atoms have (+) particles in the center, and are mostly empty space. He called these (+) particles protons. He called the center of atoms the nucleus. Rutherford’s Experiment Radioactive material emits beam of (+) alpha particles Screen Gold foil Most particles went nright through! Strangely, some particles are deflected Rutherford’s Experiment Gold Nucleus Most α particles went through the gold. The atom is mostly empty space. Rutherford’s Experiment Some particles deflected and others even bounced back… this was a crazy! The atom had a very dense (+) center. Rutherford called it the nucleus.


Niels Bohr (1913)
Niels Bohr improved on Rutherford’s model. Every atom has a specific number of electron shells. He proposed that electrons move around the nucleus in specific layers, or shells.

James Chadwick (1932)
Chadwick discovered neutrons. He called these particles neutrons. Working with Rutherford, he discovered particles with no charge. Neutrons are also found in the nucleus.

The Modern Model (1932-)
Work done since 1920 has changed the model. It is impossible to know where an electron is at any given time. The new atomic model has electrons moving around the nucleus in a cloud. The Current Atomic Model There are Protons Neutrons Electrons





Lest to Watching my Video on YOUTUBE

https://www.youtube.com/watch?v=LkLCzh3rSY8&t=112s


IMPLEMENTATION PLAN OF LEARNING BASED ON THE CURRICULUM 2013


IMPLEMENTATION PLAN OF LEARNING (RPP)

Number                       : 2
Class / Semester          : XI / 1
 Learning Material       : Thermochemistry
 Time Allocation          : 12 × 45 minutes
Number of Meetings    : 5 times

A. Basic Competence (KD)
1.      Distinguish exothermic reactions and endothermic reactions based on experimental                results and energy level diagrams.
2.      Determine ∆H reaction based on Hess law, standard enthalpy change data, and bond  
energy data.
3.      Design, perform, summarize and present experimental results of exothermic reactions and endothermic reactions.
4.      Design, perform, and conclude and present experimental results of determination of a reaction ∆H.

B. Indicators of Competency Achievement (GPA)
1.      Describes the system and environmental understanding along with the system
      classification.
2.      Differentiate the various changes in the enthalpy of a substance.
3.       Categorize exothermic and endothermic reactions based on experimental results and
       energy level diagrams.

4.      Analyze data to create energy level diagrams.
5.      Determine ∆H reaction based on Hess law, standard enthalpy change data, and bond   
       energy data.
6.      Designing and experimenting exothermic reactions and endothermic   reactions.
7.      Presents the results of experimental exothermic and endothermic reactions in the form
       of a written report.
8.      Determining the heat involved in the reaction based on experimental results of
       exothermic and endothermic reactions.
9.       Design and conduct experimental measurement of enthalpy changes with calorimeter.
10.  Presents the results of experimental m easurement of enthalpy changes with   
         calorimeter in the form of a written report.
11.  Determine the reaction ∆H based on the experimental data measuring the enthalpy
       changes with the calorimeter.
C. Learning Objectives
a.      Affective
1.      Students can realize the existence of regularity in thermochemistry as a form of greatness of God Almighty.
2.      Students can show high curiosity in understanding thermochemistry.
3.      Students can demonstrate honest, disciplined, responsible, polite, cooperative, and pro-active behavior in conducting experiments.

b.      Cognitive
1.      Students can explain the understanding of the sytem and the environment and classification system
2.      Students can distinguish various kinds of changes in the enthalpy of a substance.
3.      Students can categorize exothermic and endothermic reactions based on experimental results and energy level diagrams.
4.      Students can analyze data to create energy level diagram.
5.      Students can determine H reaction based on Hess law, standard enthalpy change data, and bond energy data.
c.       Psychomotor
1.      Students can design and experiment on exothermic reactions and endothermic reactions.
2.      Students can present experimental results of exothermic and endothermic reactions in the form of a written report.
3.      Students can determine the heat involved in the reaction based on experimental results of exothermic and endothermic reactions.
4.      Students can design and conduct experimental measurement of enthalpy changes with calorimeter.
5.      Students may present experimental results of measurement of enthalpy changes with calorimeter in the form of a written report.
6.      Students can specify H reaction based on experimental data of measurement of enthalpy changes with calorimeter.

D. Learning Materials
a.      Factual material
1.      Calorimeter
2.      Energy diagram C

b.      oncept material
1.      System and environment
2.      Exothermic and endothermic reactions
3.      Energy and reaction enthalpy
4.      Change of standard enthalpy

c.       Principle material
The use of Hess law, enthalpy of standard formation, and bond dissociation energy to determine the enthalpy of the reaction



d.      Material procedure
1.      Procedure of experimenting exothermic and endothermic reactions
2.      The experimental procedure of measuring enthalpy changes with calorimeter
E. Learning Method
1.      Interactive lecture
2.      Practicum
3.      Group discussion
4.      Exercise questions
F. Learning Activities
1.     The 1st Meeting
A.    Introduction (15 minutes)
   Teachers greet and pray together (as an implementation of religious values).
   Teachers absent, conditioned classes and habituation (as an implementation of
     discipline values). Apperception: Teacher explores students' knowledge of
      thermochemistry.
   Motivate: The teacher asks the question "Why did the government convert kerosene
      into LPG? Is it true that LPG is cheaper and more efficient than kerosene? By
      studying thermochemistry, we can answer these questions.
  Teachers deliver learning objectives.
B.     Core activities (60 minutes)
   The teacher invites students to observe the image of a chemical reaction in a beaker.
  Students individually observe the image of a chemical reaction in a beaker (carefully,
    thoroughly, as an expression of curiosity).
  Students are motivated / given the opportunity to question as an expression of
    curiosity.
   Exploration: Students are individually asked to present the results of their analysis to
     determine which systems and which include the environment.
   Elaboration: Students in pairs discussed exothermic and endothermic reactions and
      their energy diagrams.
  Class discussion of group discussion results.
  Teacher appoints students randomly to create energy diagrams from the sample
     reaction given on the board.
   Confirmation: Teacher confirms / re-explains in case of mistake in material
      understanding.
  Classically students agree on the results of the material development of the group to be   
     conclusions intact (democratically).
  Teachers provide additional information as a reinforcement of student conclusions.

C.    Closing (15 minutes)
  Resume: The teacher guides students to conclude about the system and environment,
    exothermic and endothermic reactions, and energy diagrams.
  Reflections: Provides questions relating to systems and environments, exothermic and
    endothermic reactions, and energy diagrams.
   Follow-up: Individual assignment to create a table containing 5 examples of systems
     and environments that can be observed in everyday life.
  Future learning plan: Exothermic and endothermic reaction and enthalpy practices and
    changes.

2.      2nd Meeting
A.    Introduction (15 minutes)
  Teachers greet and pray together (as an implementation of religious values).
  Teachers absent, conditioned classes and habituation (as an implementation of
    discipline values). Apperception: Teachers explore students' knowledge of exothermic
    and endothermic reactions.
  Motivate: The teacher explains that to better understand the exothermic and
    endothermic reactions, an experimental exothermic and endothermic reaction will be
    performed.
  Teachers deliver learning objectives.


B.     Core activities (100 minutes)
   Students are seated in groups to design and conduct exothermic and endothermic
     reaction experiments.
  Teacher asks questions relating to exothermic and endothermic reaction materials at
     previous meetings.
  Students individually answer questions about exothermic reaction materials and
    endotherms (carefully, thoroughly, as an expression of curiosity).
  The teacher invites students to design an exothermic and endotherm experiments in
    accordance with the worksheet
 Students in groups produce exoterm and endotherm experiments that match the  
    worksheet (carefully, thoroughly, as an expression of curiosity).
  Exploration: Students in groups conduct exothermic and endothermic experiments in
    accordance with the worksheet.
  Elaboration: Students in groups analyze experiment data to answer questions that are
    available in the worksheet.
  The teacher conditions the student to return to the class to continue the material
    explanation of the enthalpy and its changes.
  Confirmation: Teacher confirms / re-explains in case of mistake in material
     understanding.
   Classically students agree on the results of the material development of the group to
      be conclusions intact (democratically).
  Teachers provide additional information as a reinforcement of student conclusions.

C.    Closing (20 minutes)
  Resume: The teacher guides students to conclude about enthalpy and its changes.
  Reflection: Provide questions related to enthalpy and its changes.
√ Follow-up: Group assignments to make experimental reports of exothermic and
   endothermic reactions.
  Next lesson plan: Calorimetry.

3.     The 3rd Meeting
A.   Introduction (15 minutes)
 Teachers greet and pray together (as an implementation of religious values).
√ Teachers absent, conditioned classes, and habituation (as an implementation of
   discipline values).
√ Apperception: Teacher explores students' knowledge of calorimeter.
√ Motivate: The teacher explains that one way to measure the enthalpy changes of a
   reaction  is to use a calorimeter.
√ Teachers deliver learning objectives.

B.     Core activities (60 minutes)
√ Students are seated in groups to carry out experiments measuring enthalpy changes
   with calorimeters. • Teacher explains about calorimetry and how to use calorimeter.
√ Students individually pay attention to teacher's explanation (carefully, thoroughly, as an  
   expression of curiosity).
√ Students are motivated / given the opportunity to question as an expression of curiosity.
√ The teacher invites students to design an experimental measurement of enthalpy
   changes with the corresponding calorimeter of the worksheet
√ Students in groups produce experimental measurement of enthalpy changes with
   calorimeters corresponding to the worksheet (carefully, thoroughly, as an expression of
   curiosity).
√ Exploration: Students in groups conduct experiments measuring changes in enthalpy
   with calorimeters corresponding to the worksheet.
√ Elaboration: Students in groups analyze experiment data to answer questions that are
   available in the worksheet.
√ Confirmation: Teacher confirms / re-explains in case of mistake in material
   understanding.
√ Classically students agree on the results of the material development of the group to be
   conclusions intact (democratically).
√ Teachers provide additional information as a reinforcement of student conclusions.
C.    Closing (15 minutes)
√ Resume: The teacher guides students to conclude about calorimetry.
√ Reflection: Provide questions related to calorimetry.
√ Follow-up: Group assignments to make experimental reports of enthalpy changes
   measurements with calorimeters.
√ Future learning plan: Measurement of enthalpy changes using Hess law and bond    
   energy.

4. The 4th Meeting
A. Introduction (15 minutes)
√ Teachers greet and pray together (as an implementation of religious values).
√ Teachers absent, conditioned classes, and habituation (as an implementation of
   discipline values).
√ Apperception: Teacher explores students' knowledge of measuring reaction enthalpy
   changes.
√ Motivate: The teacher explains that sometimes the measurement of the enthalpy
   changes of a reaction can not be directly determined with the calorimeter, such as the
   change in the enthalpy of standard CO formation. The carbon-burning reaction is
   unlikely to produce only CO gas without the formation of CO2 gas.
√ Teachers deliver learning objectives.
B. Core activities (100 minutes)
 Teacher invites students to review the literature on Hess law and bond energy.
√ Students individually review the literature on Hess law and bond energy (carefully,
         thoroughly, as an expression of curiosity).
√ Students are motivated / given the opportunity to question as an expression of curiosity.
√ Exploration: Students are individually asked to present the results of their analysis.
√ Elaboration: Students individually do exercise questions for measuring enthalpy
         changes using Hess law and bond energy.
√ Class discussion on the exercise of the questions given.
√ Confirmation: Teacher confirms / re-explains in case of mistake in material     
   understanding.
√ Classically students agree on the results of material development from class discussions
         to be conclusions intact (democratically).
√ Teachers provide additional information as a reinforcement of student conclusions.
C. Closing (20 minutes)
 Resume: The teacher guides students to conclude about the measurement of enthalpy
    changes using Hess's law and bond energy.
 Reflection: Provides questions relating to the measurement of enthalpy changes using Hess's law and bond energy.
 Follow-up: Assignments answer questions on textbook features.
  Future learning plan: Fuel and enthalpy changes.

5.      The 5th Meeting
A. Introduction (15 minutes)
          Teachers greet and pray together (as an implementation of religious values).
 Teachers absent, conditioned classes, and habituation (as an implementation of
             discipline values).
√ Apperception: Teacher explores students' knowledge of fuel.
√ Motivate: Teachers explain that fuel is a compound that when burned produces heat
            that can be utilized for various purposes. The choice of fuel should take into
            consideration factors such as the value of the calorie fuel, its availability, the level of   
            cleanliness, and its contamination.
√ Teachers deliver learning objectives.

B. Core activities (60 minutes)
 The teacher invites students to analyze the data table of the calorific value of some
             fuel fuel.
 Students individually analyze the data tables of burning calorific values ​​of some
             fuels (carefully, thoroughly, as an expression of curiosity).
 Students are motivated / given the opportunity to question as an expression of
             curiosity.
 Exploration: Students are individually asked to present the results of their analysis.
 Elaboration: Students in pairs determine the fuel calorific value of some fuels and
             analyze the fuel more efficiently.
 Class discussion of group discussion results.
 Confirmation: Teacher confirms / re-explains in case of mistake in material
              understanding.
 Classically students agree on the results of material development from class
             discussions to be conclusions intact (democratically).
 Teachers provide additional information as a reinforcement of student conclusions
C. Closing (15 minutes)
 Resume: The teacher guides students to conclude about fuel and enthalpy changes.
√ Reflection: Provide questions related to fuel and enthalpy changes.
√ Follow-up: Group assignments to make a paper on converting kerosene to LPG  
 Next lesson plan: The reaction rate.

G. Learning Resources / Materials / Tools
1. Learning resources
     a.  Textbook chemistry class XI by Superior Sudarmo Chapter 2 pages 54-93, Erland
     b. Articles on conversion of kerosene to LPG
2. Teaching materials
    Presentation materials, practicum worksheet exothermic and endothermic reactions,          practical workheet of enthalpy change measurement with calorimeter
3. Tools
     a. Computer / LCD, VCD / CD player
     b. Exothermic and endothermic reaction practice kits and practicum measurement of      enthalpy changes with calorimeter
H. Assessment
      1. Cognitive
          a. Results of answers to exercise questions (PR)
          b.  Daily tests
  Problems example:
If known ΔHfo CS2, CO2, and SO2 are respectively +89.5 kJ / mol;Ø -394 kJ / mol, and -297 kJ / mol. Compute ΔCc CS2.  Known on the burning of 1 gram of carbon released heat 34 kJ (Ar C =Ø 12), how much heat is generated in the burning of 1 mol of carbon?  If the average bond energy is known:
H-H = 436 kJ / mol
C = C = 607 kJ / mol
C-H = 415 kJ / mol
C-C = 348 kJ / mol
Calculate ΔH in the reaction: C3H6 (g) + H2 (g) → C3H8 (g)
The heat that occurs in combustion of 184 grams of C2H5OH can raise the temperature of 1,000 grams of water from 20oC to 100oC. Calculate ΔHco C2H5OH. Known water heat type = 4.2 J / g K and Ar C = 12, H = 1, O = 16 If known:
C + 2S → CS2 ΔH = +27.55 kcal
C + O2 → CO2 ΔH = -94 kcal
S + O2 → SO2 ΔH = -70.9 kcal
How much heat is released if 9 grams of CS2 is completely burned? (Ar C = 12, S = 32)
2. Psychomotor
a.       Performance in the practice of exothermic and endothermic reactions as well as the             
practice of measuring enthalpy changes with calorimeters.
b.      A written report on the practice of exothermic and endothermic reactions as well as the practice of measuring enthalpy changes with calorimeter and discussion group papere on kerosene conversion to LPG.
3. Affective
    Observation of learning attitudes and behaviors, group discussions, and lab work


INSTRUMENTS OF ASSESSMENT OF PSYCHOMOTORIC ACTIVITIES – 1


Indicator :
Students can design, perform, and present experimental results of exothermic reactions and endothermic reactions.

Aspect of assessment : Psychomotor
Activity Title              : Exothermic and endothermic reactions
Date Rating                :
Class                           :
No
Name of Students
Aspect In The Value
Score
value
Appropriateness of implementation by means of
Initiatives in work
Contribution in group friends
Written report results

1







2







3








Guidelines for psychomotor assessment: 1 = Less; 2 = Enough; 3 = Good; 4 = Very good



INSTRUMENTS OF ASSESSMENT OF PSYCHOMOTORIC ACTIVITIES – 2

Indicator :
Students can design, perform, and present experimental results of enthalpy change measurements with calorimeters.

Aspect of assessment : Psychomotor
Activity title               : Measurement of enthalpy changes with calorimeter
Date Rating               :
Class                          :

No
Name of Students
Aspect In The Value
Score
value
Appropriateness of implementation by means of
Initiatives in work
Contribution in group friends
Written report results

1







2







3








Guidelines for psychomotor assessment: 1 = Less; 2 = Enough; 3 = Good; 4 = Very good


INSTRUMENTS OF ASSESSMENT OF PSYCHOMOTORIC ACTIVITIES – 3


Indicator:
Students can draw up ideas about converting kerosene to LPG.

Aspect of assessment     : Psychomotor
Activity Title                  : Conversion of kerosene to LPG
Date Rating                    :
Class                               :

No
Name of Students
Aspect In The Value
Score
value
Appropriateness of implementation by means of
Initiatives in work
Contribution in group friends
Written report results

1







2







3








Guidelines for psychomotor assessment: 1 = Less; 2 = Enough; 3 = Good; 4 = Very good




AFARATIVE ACTIVITY ASSESSMENT INSTRUMENTS


No.
Name of Student
Aspect In The Value
The score result
Criteria
Cooperation in the group
concern
In the role
honesty
1.







2.







3.








Guidelines for affective ratings: 1 = Low; 2 = Medium; 3 = Height