What can be said about an endothermic reaction with a negative entropy change? The reaction is What can be said about...
What can be said about an endothermic reaction with a negative entropy change?
The reaction is
What can be said about an endothermic reaction with a negative entropy change?
| spontaneous at all temperatures. | |
| spontaneous at high temperatures. | |
| spontaneous at low temperatures. | |
| spontaneous in the reverse direction at all temperatures. | |
| nonspontaneous in either direction at all temperatures. |
Homework Answers
Ans: spontaneous in the reverse direction at all temperatures.
?G = ?H -T?S
For spontaneous reactions, ?G = -ve
Given that endothermic reaction with a negative entropy change.
?H = +ve ?S= -ve
?G = ?H -T?S = +ve - T (-ve) = +ve
Therefore, the given reaction is non-spontaneous in forward direction.
Reverse direction:
Given that endothermic reaction with a negative entropy change. Then, ?H = +ve ?S= -ve
For reverse reaction ?H = -ve ?S= +ve
?G = ?H -T?S = -ve - T (+ve) = -ve
?G = -ve
Therefore, the given reaction is spontaneous in reverse direction.
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