Spontaneous Reaction Video Lessons

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Problem: Consider the signs for ΔHrxn and ΔSrxn for several different reactions. In which case is the reaction spontaneous at all temperatures?a) ΔHrxn < 0; ΔSrxn < 0b) ΔHrxn > 0; ΔSrxn > 0c) ΔHrxn < 0; ΔSrxn > 0d) ΔHrxn > 0; ΔSrxn < 0

FREE Expert Solution

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
Consider the signs for ΔHrxn and ΔSrxn for several different reactions. In which case is the reaction spontaneous at all temperatures?
a) ΔHrxn < 0; ΔSrxn < 0
b) ΔHrxn > 0; ΔSrxn > 0
c) ΔHrxn < 0; ΔSrxn > 0
d) ΔHrxn > 0; ΔSrxn < 0

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