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C. Assessment/Applications Test I. True or False. Directions: Read each statement very carefully. Write TRUE if the statement is correct; otherwise write FALSE on the line provided before each number. Hess's Law states that a chemical reaction is independent of the route by which chemical reactions takes place while keeping the same 1. a. initial and final conditions c. initial conditions only b. final conditions only d. mid-conditions 2. The thermochemical equation showing the formation of ammonia, NH3 from its element is: N2 (g) + 3 H2 (g) → 2 NH3 (g); AH = - 92 kJ. a. lost to the surroundings b. gained in the surroundings 3. What happens to the value of AH for a thermochemical reaction if the reaction is reversed? a. AH is the reciprocal of the original value, and the sign remains the same. b. AH has the same numerical value, and the sign remains the same. AH is the reciprocal of the original value and the sign changes. d. AH has the same numerical value and the sign changes. с. Which is NOT true about entropy? It is denoted by the symbol S. It is a measure of the randomness or disorder of a system. It is a measure of how much energy is unavailable for conversion into work. d. A positive value of a change in entropy indicates that the final state is less random than the initial state. 4. а. b. с. Which reaction below is endothermic? a. 2NO2(g) N2O4(g), AH = -58.0 kJ b. PC15(g) = PC13(g) c. N2(g) = 3H2(g) + 2NH3(g), AH = -92.38 kJ d. 2PC13(g) + O2(g) = 2POCl3(g), AH = -508 kJ + Cl2(g), AH = 87.9 kJ 5.

C. Assessment/Applications Test I. True or False. Directions: Read each statement very carefully. Write TRUE if the statement is correct; otherwise write FALSE on the line provided before each number. Hess's Law states that a chemical reaction is independent of the route by which chemical reactions takes place while keeping the same 1. a. initial and final conditions c. initial conditions only b. final conditions only d. mid-conditions 2. The thermochemical equation showing the formation of ammonia, NH3 from its element is: N2 (g) + 3 H2 (g) → 2 NH3 (g); AH = - 92 kJ. a. lost to the surroundings b. gained in the surroundings 3. What happens to the value of AH for a thermochemical reaction if the reaction is reversed? a. AH is the reciprocal of the original value, and the sign remains the same. b. AH has the same numerical value, and the sign remains the same. AH is the reciprocal of the original value and the sign changes. d. AH has the same numerical value and the sign changes. с. Which is NOT true about entropy? It is denoted by the symbol S. It is a measure of the randomness or disorder of a system. It is a measure of how much energy is unavailable for conversion into work. d. A positive value of a change in entropy indicates that the final state is less random than the initial state. 4. а. b. с. Which reaction below is endothermic? a. 2NO2(g) N2O4(g), AH = -58.0 kJ b. PC15(g) = PC13(g) c. N2(g) = 3H2(g) + 2NH3(g), AH = -92.38 kJ d. 2PC13(g) + O2(g) = 2POCl3(g), AH = -508 kJ + Cl2(g), AH = 87.9 kJ 5.

Chemistry
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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C. Assessment/Applications Test I. True or False. Directions: Read each statement very carefully. Write TRUE if the statement is correct; otherwise write FALSE on the line provided before each number. Hess's Law states that a chemical reaction is independent of the route by which chemical reactions takes place while keeping the same 1. a. initial and final conditions c. initial conditions only b. final conditions only d. mid-conditions 2. The thermochemical equation showing the formation of ammonia, NH3 from its element is: N2 (g) + 3 H2 (g) → 2 NH3 (g); AH = - 92 kJ. a. lost to the surroundings b. gained in the surroundings 3. What happens to the value of AH for a thermochemical reaction if the reaction is reversed? a. AH is the reciprocal of the original value, and the sign remains the same. b. AH has the same numerical value, and the sign remains the same. AH is the reciprocal of the original value and the sign changes. d. AH has the same numerical value and the sign changes. с. Which is NOT true about entropy? It is denoted by the symbol S. It is a measure of the randomness or disorder of a system. It is a measure of how much energy is unavailable for conversion into work. d. A positive value of a change in entropy indicates that the final state is less random than the initial state. 4. а. b. с. 5. Which reaction below is endothermic? a. 2NO2(g) N2O4(g), AH = -58.0 kJ b. PC15(g) = PC13(g) c. N2(g) = 3H2(g) + 2NH3(g), AH = -92.38 kJ d. 2PC13(g) + O2(g) = 2POCl3(g), AH = -508 kJ + Cl2(g), AH = 87.9 kJ
Transcribed Image Text:C. Assessment/Applications Test I. True or False. Directions: Read each statement very carefully. Write TRUE if the statement is correct; otherwise write FALSE on the line provided before each number. Hess's Law states that a chemical reaction is independent of the route by which chemical reactions takes place while keeping the same 1. a. initial and final conditions c. initial conditions only b. final conditions only d. mid-conditions 2. The thermochemical equation showing the formation of ammonia, NH3 from its element is: N2 (g) + 3 H2 (g) → 2 NH3 (g); AH = - 92 kJ. a. lost to the surroundings b. gained in the surroundings 3. What happens to the value of AH for a thermochemical reaction if the reaction is reversed? a. AH is the reciprocal of the original value, and the sign remains the same. b. AH has the same numerical value, and the sign remains the same. AH is the reciprocal of the original value and the sign changes. d. AH has the same numerical value and the sign changes. с. Which is NOT true about entropy? It is denoted by the symbol S. It is a measure of the randomness or disorder of a system. It is a measure of how much energy is unavailable for conversion into work. d. A positive value of a change in entropy indicates that the final state is less random than the initial state. 4. а. b. с. 5. Which reaction below is endothermic? a. 2NO2(g) N2O4(g), AH = -58.0 kJ b. PC15(g) = PC13(g) c. N2(g) = 3H2(g) + 2NH3(g), AH = -92.38 kJ d. 2PC13(g) + O2(g) = 2POCl3(g), AH = -508 kJ + Cl2(g), AH = 87.9 kJ
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