Chemistry

Foti — Mon, 26 Oct 2009 17:09:02 +0000

Chapter 19 Homework Problems: (1,2abc, 3, 5, 6, 7, 8-13, 18, 19)

Answers to Thermochemistry Practice Problems

1) endothermic, heat moves towards the system (ice pack)

2) metal releases heat quickly and your hand may burn, cloth releases heat slower therefore grab the cloth of the belt.

3) Both raise the temperature 1 degree C, Specific Heat is 1 gram, Heat capacity an object.

4) q = (22.6)(43.0)(0.897) q=872J

5) 45J=(1,300)(56.0)(C) C= 0.00062 j/gC

6) 450J = (2500)(176)(C) C= 0.00102 j/gC

7) Heat capacity= (4.18)(185) Heat capacity= 773j/g

8 ) a. endo b. endo c. exo

9) condensation

10) exothermic steam cools to water

11) q = (60)(-5.1)(4.18)

q= -1279.08

q of metal= 1279.08

1279.08 = (4.25)(deltaH)

deltaH=301j/g

Unit 8 Chapter 11 Homework Due Friday, March 23rd, 2010

*Chapter 11 (1-3, 8-14, 20-25, 32, 57)

PAST DUE!!

Unit 7 Test Chapter 17 and 18

Unit 7 Homework

*17.3 (12)

*18.1 (3, 6, 8-17, 26)

Unit 7 Notes (Chapter 17 and 18)

*Chapter 17 Section 3, Chapter 18 Sections 1 and 2: Due February 9th, 2010

*Chapter 18 Section 3: Due February 11th, 2010

Unit 6 Test Chapter 9: Wednesday, January 20th, 2010

Unit 6 Homework: Due Wednesday, January 20th, 2010

*Chapter 9 (9-17, 23-28)

Unit 6 Notes

*Chapter 9 Section 1 Due Thursday, January 7th, 2010

*Chapter 9 Section 2 Due Friday, January 8th, 2010

*Chapter 9 Section 3 Due Monday, January 11th, 2010

Unit 5 Test Chapter 8: Wednesday, December 16th, 2009

Unit 5 Homework Due: Wednesday, December 16th, 2009

*Chapter 8 (3,5,7,10,13a,15,17,19-22,39)

Unit 5 Notes: Wednesday, December 9th, 2009

*Chapter 8 Sections 1 and 2

Unit 4 Test Chapter 7: Friday, December 4th, 2009

Unit 4 Homework Due: Friday, December 4th, 2009

*Chapter 7 (3, 4, 6-9, 12, 14, 16, 18, 20-25, 27, 29-32, 38)

Unit 4 Notes

*Chapter 7 Sections 1 and 2 Due: Tuesday, November 17th, 2009

*Chapter 7 Section 3 Due: Friday, November 20th, 2009

Unit 3 Test (Chapters 15 and 16): Friday, November 13th, 2009

Unit 3 Homework: Due Friday, November 13th, 2009

*Chapter 15 (3, 4, 6, 7, 9-11, 13, 15, 17-19)

*Chapter 16 (1-4, 8, 10, 18-20, 22-24, 26)

Unit 3 Notes:

*Chapter 15 Sections 1 and 2 Due: Tuesday, October 27th, 2009

*Chapter 15 Section 3 Due: Thursday, October 29th, 2009

*Chapter 16 Sections 1 and 2 (VSEPR only) Due: Tuesday, November 3rd, 2009

*Chapter 16 Section 3 Due: Thursday, November 5th, 2009

Unit 2 Test (Chapters 5, 13 and 14): Thursday, October 22nd, 2009

Unit 2 Homework: Due Thursday, October 22nd, 2009

*Chapter 5 (1, 5-10, 12-18, 21, 23, 30-32)

*Chapter 13 (1, 5-8, 10)

*Chapter 14 (1-7, 9)

Unit 2 Notes:

*Chapter 5 Sections 1, 2, 3 and 4 Due: Monday, October 5th, 2009

*Chapter 13 Sections 1 and 2 Due: Tuesday, October 13th, 2009

* Chapter 14th Sections 1 and 2 Due: Wednesday, October 14th, 2009

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