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Question

Which of the following is most likely to produce a spontaneous reaction?

A
Negative Enthalpy
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B
Positive Enthalpy
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C
Negative Entropy
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D
Positive Entropy
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E
Negative Enthalpy and positive Entropy
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Solution

The correct option is E Negative Enthalpy and positive Entropy
For the spontaneous reaction, the negative enthalpy and positive entropy is most likely.
As for spontaneous reaction the value of ΔG must be negative.
Hence, as per formula,
ΔG=ΔHTΔS,
So, if ΔH and ΔS are negative and positive respectively then the value of the ΔG must be negative whatever the temperature.

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