Student Journal - Week 18 - Weebly

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http://apwscience8.weebly.com

Name: __________________________ Period:_________

STUDENT JOURNAL – Week 18 – Chemical Reaction and Energy Overarching Goal for the Week:

• Be able to identify when a chemical reaction as taken place and whether energy was released or absorbed

Learning Objectives: Compare and contrast endothermic and exothermic reactions Identify forms of energy produced in a chemical reaction Vocabulary !Law of Conservation of Energy Exothermic Process Endothermic Process !

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My Mad Minute Graph

What's Your Average?

Day 1 ---- Day 2 ___ Day 3 ___ + Day 4 ___

Total ___/ 3 = ____

Day #5 Mad Minute: Question #1 - Are you satisfied with your overall average for this week? Why or why not? !

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DAY 1 - Monday Kickoff:

Pencils down! Wait for Mad Minute Mad Minute Your journal from last week is due tomorrow. Today you need to make sure that everything is complete and CORRECT. What do you need to get done before tomorrow so that you can get ful l credit? Flip through your journal to f ind out. 1. 2. 3. 4. 5.

Grade and graph your Mad Minute!!!

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DAY 2 - Tuesday Kickoff: Vocabulary Quiz / Check today. Look over your words for 5 minutes before we being the quiz.

Guided Practice & Independent Practice • Complete Week 17 Journal – Due at the end of the period • If you’re week 17 Journal is complete

o Do Enrichment for extra points o Do Conservation of Mass Lab – 100 Extra Points o Do 200 Point “Balancing Equations Worksheet #3

! You must be able to do and explain 2 randomly chosen problems to receive credit.

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DAY 3 - Wednesday

Kickoff:

Pencils down! Wait for Mad Minute Mad Minute In a chemical reaction the mass of the ________________ is always ________________ to the __________ of the ______________. This is the Law of _______________________ of Mass.

Grade and graph your Mad Minute!!!

Learning Objectives

Compare and contrast endothermic and

exothermic reactions

Identify forms of energy produced in a chemical

reaction !

Summary:

Energy and Chemical Reactions • In chemical reactions, energy is either _____________ or ______________. • In chemical reactions, atoms ________________. • Rearrangement involves some form of __________, usually ____________ energy.

Light From Chemical Reactions • Some reactions give off __________ with almost ____ thermal energy. • __________ light occurs at ______________________.

Conservation of Energy • Energy is ___________ in ______________ molecules. • ___________________________________________ states that energy

cannot be ____________ or ______________, simply ______________ from one __________ to ________________.

Chemical Bonds • Molecules have ________________ energy stored in their ____________. • Energy is stored in the ______ that you eat and ______________ to your cells.

Net Release of Energy • When atoms rearrange, bonds are ___________ and new ________ form.

• _______________ bonds_______________ energy. • _______________ bonds _______________ energy.

• An _____________________ process _______________ energy. • The _______________ in an exothermic reaction have

____________________ than the reactants.

• • An ____________________ process _____________ energy. • The products in an endothermic reaction have a ________________energy than the

reactants.

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Energy and Chemical Change Name: _____________________

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Questions /Examples/ Workspace: Guided Practice & Independent Practice Chapter 8; Lesson 3 – CCM/Reinforcement Exit Ticket !

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DAY 4-Thursday Kickoff:

Pencils down! Wait for Mad Minute Mad Minute A chemical reaction that releases thermal energy is called _________________. A chemical reaction that absorbs thermal energy is called _________________. Is energy ever created or destroyed in a chemical reaction? _____________ The Sun produces heat and l ight by fusing hydrogen atoms into helium atoms. Do you think this process is endothermic or exothermic? The chemical Freon is used in refrigerators to make them cold. Do you think this process is endothermic or exothermic?

Grade and graph your Mad Minute!

Vocabulary Carbohydrate – Exothermic Process –

Quest ions How does your body turn food into energy? What happens to bonds in chemical reactions?

In an exothermic reaction, how does the energy of the products compare to the energy of the reactants?

Endothermic Process Indication – a sign that something is occuring

Why isn’t ice melting in your hand a chemical reaction? What is one indication that dissolving ammonium nitrate is an endothermic process?

How does the energy of the products compare to the energy of the reactants in an endothermic reaction?

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Questions /Examples/ Workspace: Guided Practice & Guided Practice • CCM – Chapter 8; Lesson 3 • Text Based Questions

Exit Ticket

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DAY 5 - Friday Kickoff: Review and correct this week’s kickoffs Review/Reteach/ Work Period

FINAL EXAM NEXT WEEK

It covers everything we have done this semester:

History of the Atomic Model Periodic Table

States of Matter Changes in States of Matter

Radioactivity Compounds

Acids & Bases

A good place to review would be Chapter Content Mastery Worksheets, other worksheets, notes, and of course the book. Also, the website is good if there are

topics that gave you a lot of trouble.

Name: ________________________________ Period: _____

Aker-CJH-Fall 2004

Conservation of Mass Lab

The Law of Conservation of Mass states that mass in a closed system will remain

constant, regardless of the processes acting on the system. A closed system is one to

which nothing can be added or taken away.

Procedure:

1. Record the mass of an empty beaker using the digital scale or triple beam balance.

2. Add a set volume of water to the beaker (record the volume of water added and mass of the water).

3. Record the mass of an Alka Seltzer tablet.

4. Add the Alka Seltzer tablet to the beaker with water, and wait for all fizzing to stop.

5. Record the volume of water in the beaker.

5. Record the mass of the the beaker and its contents.

Data Collection:

Do this column BEFORE the experiment

starts:

Do this column AFTER the experiment is

finished.

Mass of empty beaker: __________

Mass of beaker + water: ___________

Mass of water: ___________

Volume of water: __________

Mass of alka seltzer tablet: ___________

Using the masses recorded above, calculate the

following:

Mass of beaker + water + Alka Seltzer: _____

Ending volume of water after fizzing has stopped:

_______

Mass of beaker + water + Alka Seltzer: _____

Questions:

1. Is the ending mass of the beaker, water, and alka seltzer exactly equal to the calculated starting mass of the

beaker, water, and Alka Seltzer? ________________________________

2. Restate the Law of Conservation of Mass in your own words:

____________________________________________________________________________

____________________________________________________________________________

3. According to the Law of Conservation of Mass, the starting and ending mass of the ingredients should be

exactly the same. Give your best explanation or guess as to why the masses are different in this situation?

____________________________________________________________________________

____________________________________________________________________________

Name: ________________________________ Period: _____

Aker-CJH-Fall 2004

4. Is the starting volume of liquid and ending volume of liquid the same? ______ Explain why. _________

____________________________________________________________________________

____________________________________________________________________________

5. Do you think the system in this lab is a closed or an open system? Explain.

____________________________________________________________________________

____________________________________________________________________________

6. If you were to measure the mass of an Alka Seltzer tablet and leave the tablet sitting for a day, and measure

its mass again, would you expect the two masses to be equal? __________ What is different about the

situation in this lab?

____________________________________________________________________________

7. Has a chemical reaction occurred in this lab? ________ How do you know? ___________________

___________________________________________________________________________

8. If you think a chemical reaction occurred in this lab, does this explain why there was a change in mass at the

beginning of the experiment? ________ Why or why not? __________________________________

____________________________________________________________________________

____________________________________________________________________________

Make sure you have put the appropriate standard metric units after your answers where appropriate!

© 2004 Cavalcade Publishing, All Rights Reserved For chemistry help, visit www.chemfiesta.com

Balancing Equations Worksheet #3 1) ____ Na3PO4 + ____ KOH ! ____ NaOH + ____ K3PO4 2) ____ MgF2 + ____ Li2CO3 ! ____ MgCO3 + ____ LiF 3) ____ P4 + ____ O2 ! ____ P2O3 4) ____ RbNO3 + ____ BeF2 ! ____ Be(NO3)2 + ____ RbF 5) ____ AgNO3 + ____ Cu ! ____ Cu(NO3)2 + ____ Ag 6) ____ CF4 + ____ Br2 ! ____ CBr4 + ____ F2 7) ____ HCN + ____ CuSO4 ! ____ H2SO4 + ____ Cu(CN)2 8) ____ GaF3 + ____ Cs ! ____ CsF + ____ Ga 9) ____ BaS + ____ PtF2 ! ____ BaF2 + ____ PtS 10) ____ N2 + ____ H2 ! ____ NH3 11) ____ NaF + ____ Br2 ! ____ NaBr + ____ F2 12) ____ Pb(OH)2 + ____ HCl ! ____ H2O + ____ PbCl2 13) ____ AlBr3 + ____ K2SO4 ! ____ KBr + ____ Al2(SO4)3 14) ____ CH4 + ____ O2 ! ____ CO2 + ____ H2O 15) ____ Na3PO4 + ____ CaCl2 ! ____ NaCl + ____ Ca3(PO4)2 16) ____ K + ____ Cl2 ! ____ KCl 17) ____ Al + ____ HCl ! ____ H2 + ____ AlCl3 18) ____ N2 + ____ F2 ! ____ NF3 19) ____ SO2 + ____ Li2Se ! ____ SSe2 + ____ Li2O 20) ____ NH3 + ____ H2SO4 ! ____ (NH4)2SO4

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Student Journal - Week 18 - Weebly