exothermic reaction?

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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Answer number 2-5
2. Which represents an exothermic reaction?
A. AH(reactants) < AH(products)
B. AH(reactants) = AH(products)
C. AH(reactants) > AH(products)
D. AH(reactants) 2 AH(products)
3. Which one of the following statements best describes the enthalpy change of a
reaction?
A. The energy released when chemical bonds are formed during a chemical
reaction
B. The energy consumed when chemical bonds are broken during a chemical
reaction
C. The difference between the energy released by bond formation and the
energy consumed by bond cleavage during a chemical reaction.
D. The increase in disorder of the system as a reaction proceeds.
4. Calculate the enthalpy of decomposition of ammonium nitrate. Use the following
= -366 kJ/mole ; N2Otg
enthalpy values: NH,NO3)
H2Ow-242 kJ/mole
NH,NO3)
82 kJ/mole ; and
%3D
N2Ots + 2H2Og
A. -36KJ
B. 64 kJ
C. 28kJ
D. 95 kJ
5. Which of the equation below refers to the enthalpy of combustion?
A. Na(g) Na+(g) + e-
B. C,H;OH+ 3021g) 2CO2( + 3H20 )
С. 2Ср, +
D. Na Natla)
AH = -364 kJmol-1
AH = -
1286 kJmol-1
2H2)
C2H4 (8)
AH = - 52.3 kJmol-1
AH = - 364 kJmol-
Transcribed Image Text:2. Which represents an exothermic reaction? A. AH(reactants) < AH(products) B. AH(reactants) = AH(products) C. AH(reactants) > AH(products) D. AH(reactants) 2 AH(products) 3. Which one of the following statements best describes the enthalpy change of a reaction? A. The energy released when chemical bonds are formed during a chemical reaction B. The energy consumed when chemical bonds are broken during a chemical reaction C. The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reaction. D. The increase in disorder of the system as a reaction proceeds. 4. Calculate the enthalpy of decomposition of ammonium nitrate. Use the following = -366 kJ/mole ; N2Otg enthalpy values: NH,NO3) H2Ow-242 kJ/mole NH,NO3) 82 kJ/mole ; and %3D N2Ots + 2H2Og A. -36KJ B. 64 kJ C. 28kJ D. 95 kJ 5. Which of the equation below refers to the enthalpy of combustion? A. Na(g) Na+(g) + e- B. C,H;OH+ 3021g) 2CO2( + 3H20 ) С. 2Ср, + D. Na Natla) AH = -364 kJmol-1 AH = - 1286 kJmol-1 2H2) C2H4 (8) AH = - 52.3 kJmol-1 AH = - 364 kJmol-
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