2. The following reaction isby the reaction.4A1 (s) + 302 (g)a) exothermic, released→2A1203 (s)b) exothermic, absorbedc) endothermic, releasedd) endothermic, absorbedand therefore heat isAH° = -3351 kJ 3. When 45 g of an alloy at 100°C is dropped into 100.0 g of water at25°C, the final temperature is 37°C. What is the specific heat of thealloy (J/g°C)?).Specific heat of water is 4.186 J/g °C_a)9.88c) 0.4234. The value for AH° for the reaction below is - 126kJ. How much heat(in kJ) is released when 2.00 mol of NaOH is formed in the reaction?2Na2O2 (s) + 2H2₂0 (1)→ 4NaOH (s) + O2(g)a) 252 kJb) 48.8d) 1.77c) 7.8 kJd) 63 kJ5. Solid A at 80°C is immersed in liquid B at 60°C. Which statementcorrectly describes the energy changes between A and B?b) - 126 kJd) Both A and B release heat.a) A releases heat and B absorbs heat.b) A absorbs heat and B releases heat.c) Both A and B absorb heat.

2. The following reaction is by the reaction. 4A1 (s) + 302 (g) a) exothermic, released → 2A1203 (s) b) exothermic, absorbed c) endothermic, released d) endothermic, absorbed , and therefore heat is AH° = -3351 kJ

2. The following reaction is by the reaction. 4A1 (s) + 302 (g) a) exothermic, released → 2A1203 (s) b) exothermic, absorbed c) endothermic, released d) endothermic, absorbed , and therefore heat is AH° = -3351 kJ

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

2. The following reaction is
by the reaction.
4A1 (s) + 302 (g)
a) exothermic, released
→
2A1203 (s)
b) exothermic, absorbed
c) endothermic, released
d) endothermic, absorbed
and therefore heat is
AH° = -3351 kJ

3. When 45 g of an alloy at 100°C is dropped into 100.0 g of water at
25°C, the final temperature is 37°C. What is the specific heat of the
alloy (J/g°C)?).Specific heat of water is 4.186 J/g °C_
a)9.88
c) 0.423
4. The value for AH° for the reaction below is - 126kJ. How much heat
(in kJ) is released when 2.00 mol of NaOH is formed in the reaction?
2Na2O2 (s) + 2H2₂0 (1)→ 4NaOH (s) + O2(g)
a) 252 kJ
b) 48.8
d) 1.77
c) 7.8 kJ
d) 63 kJ
5. Solid A at 80°C is immersed in liquid B at 60°C. Which statement
correctly describes the energy changes between A and B?
b) - 126 kJ
d) Both A and B release heat.
a) A releases heat and B absorbs heat.
b) A absorbs heat and B releases heat.
c) Both A and B absorb heat.

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