Spontaneous Reaction Video Lessons

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Problem: If a reaction is exothermic and its entropy change is positive, which statement is true? a. The reaction is spontaneous only at higher temperatures. b. The reaction is nonspontaneous at all temperatures. c. The reaction is spontaneous at all temperatures. d. The reaction is spontaneous only at lower temperatures.

FREE Expert Solution

We’re being asked to determine which of the given statements is true for a reaction.


The statements given describe the spontaneity of the reaction at different temperatures

Recall that when ΔH and ΔS are given, we can determine the spontaneity of the reaction based on their signs

We can use the Punnett square shown below:

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Problem Details

If a reaction is exothermic and its entropy change is positive, which statement is true? 

a. The reaction is spontaneous only at higher temperatures. 

b. The reaction is nonspontaneous at all temperatures. 

c. The reaction is spontaneous at all temperatures. 

d. The reaction is spontaneous only at lower temperatures.

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