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For each of the following reactions, indicate whether you would expect the entropy of the system to increase or decrease. (a) N2O4(g) → NO2(g) (b) CO(g) + H2O(g) → CO2(g) + H2(g) (c) 2 KCIO3(s) → KCI(s) + 3 O2(g) (d) CH3COOH(I )→ CH3COOH(s) (e) N2(g) + O2(g) → 2 NO(g)

For each of the following reactions, indicate whether you would expect the entropy of the system to increase or decrease. (a) N2O4(g) → NO2(g) (b) CO(g) + H2O(g) → CO2(g) + H2(g) (c) 2 KCIO3(s) → KCI(s) + 3 O2(g) (d) CH3COOH(I )→ CH3COOH(s) (e) N2(g) + O2(g) → 2 NO(g)

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Chemistry
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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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The total change for expanding: Entropy AS, = ASs + ASR AS1 cal S = unit: = eu T K - compressing the substance isothermally and reversibly from V½to V1 Reversible, isothermal process: AS = 0 * Heat is rejected from the substance • when temperature is constant - substance (s) undergoes isothermal and reversible expansion from V,to V1 ASS T ASs -at the same time, a reservoir gains the same quantity of heat - at the same time, a reservoir losses a quantity of heat ASR -Q T. ASR T Entropy change in ideal gas T2 AS = nCyln- V2 + nRln V1 General Process: The total change for compressing: T2 AS2 = ASs + ASR AS2 AS = nCpln P1 + nRln P2 %3D %3D || For the overall system: V2 AS = nRln Isothermal Process: ASsystem = AS1 + AS2 T2 AS = nCyln Constant Volume: Reversible, isothermal processes: T2 Constant Pressure: AS = nl AS = 0 Irreversible, isothermal processes: ASsystem > 0
Transcribed Image Text:The total change for expanding: Entropy AS, = ASs + ASR AS1 cal S = unit: = eu T K - compressing the substance isothermally and reversibly from V½to V1 Reversible, isothermal process: AS = 0 * Heat is rejected from the substance • when temperature is constant - substance (s) undergoes isothermal and reversible expansion from V,to V1 ASS T ASs -at the same time, a reservoir gains the same quantity of heat - at the same time, a reservoir losses a quantity of heat ASR -Q T. ASR T Entropy change in ideal gas T2 AS = nCyln- V2 + nRln V1 General Process: The total change for compressing: T2 AS2 = ASs + ASR AS2 AS = nCpln P1 + nRln P2 %3D %3D || For the overall system: V2 AS = nRln Isothermal Process: ASsystem = AS1 + AS2 T2 AS = nCyln Constant Volume: Reversible, isothermal processes: T2 Constant Pressure: AS = nl AS = 0 Irreversible, isothermal processes: ASsystem > 0
3. For each of the following reactions, indicate whether you would expect the entropy of the system to increase or decrease. (a) N2O4(g) → NO2(g) (b) CO(g) + H2O(g) → CO2(g) + H2(g) (c) 2 KCIO3(s) → KCI(s) + 3 O2(g) (d) CH3COOH(I)→ CH3COOH(s) (e) N2(g) + O2(g) → 2 NO(g)
Transcribed Image Text:3. For each of the following reactions, indicate whether you would expect the entropy of the system to increase or decrease. (a) N2O4(g) → NO2(g) (b) CO(g) + H2O(g) → CO2(g) + H2(g) (c) 2 KCIO3(s) → KCI(s) + 3 O2(g) (d) CH3COOH(I)→ CH3COOH(s) (e) N2(g) + O2(g) → 2 NO(g)
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