Analyze the table below. According to the table, if a process is spontaneous and has a positive AS, what must be true of its enthalpy change, AH? Enthalpy Change Entropy Change Spontaneous Reaction? Exothermic (-AH) Increase (+AS) | Yes, -AG at any temperature Exothermic (-AH) Decrease (-AS) | Only at low temps, if |T AS| < JAH| Endothermic (+AH) | Increase (+AS) Only at high temps, if |T AS| > |AH| Endothermic (+AH) | Decrease (-AS) No, +AG at any temperature AH must be positive. AH must be negative. C There is no way to know the enthalpy change. The enthalpy change depends on temperature.

Analyze the table below. According to the table, if a process is spontaneous and has a positive AS, what must be true of its enthalpy change, AH? Enthalpy Change Entropy Change Spontaneous Reaction? Exothermic (-AH) Increase (+AS) | Yes, -AG at any temperature Exothermic (-AH) Decrease (-AS) | Only at low temps, if |T AS| < JAH| Endothermic (+AH) | Increase (+AS) Only at high temps, if |T AS| > |AH| Endothermic (+AH) | Decrease (-AS) No, +AG at any temperature AH must be positive. AH must be negative. C There is no way to know the enthalpy change. The enthalpy change depends on temperature.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter16: Thermodynamics: Directionality Of Chemical Reactions

Section: Chapter Questions

Problem 53QRT

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