purpleelk170Lv1
16 Nov 2021
Problem 17
Page 728
Section: Problems by Topic
Chapter 17: Free Energy and Thermodynamics
Textbook ExpertVerified Tutor
16 Nov 2021
Given information
The given table is,
ΔH | ΔS | ΔG | Low Temperature | High Temperature |
- | + | - | Spontaneous | .......................... |
- | - | Temperature dependent | .......................... | .......................... |
+ | + | ........................... | ............................. | Spontaneous |
........................... | - | .......................... | Nonspontaneous | Nonspontaneous |
Step-by-step explanation
Step 1.
The Gibb’s free energy, , of the reaction is calculated as,
The reaction is spontaneous for the negative value of Gibb’s free energy. Thus, for the negative value of the enthalpy change and entropy change, the value of temperature should be positive. Thus, at high temperature, the reaction takes place spontaneously. For the positive values of enthalpy change and entropy change, the reaction is spontaneous at high temperature. For the Gibb’s free energy with positive value, the reaction is non-spontaneous at all temperatures.
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