Which of the following circumstances will result in a reaction that is spontaneous only at low temperatures?

A.) positive enthalpy change and positive entropy change

B.) negative enthalpy change and negative entropy change

C.) positive enthalpy change and negative entropy change

D.) negative enthalpy change and positive entropy change

Question

Chemistry

Mireya Dunn

22 May, 14:25

Which of the following circumstances will result in a reaction that is spontaneous only at low temperatures?

A.) positive enthalpy change and positive entropy change

B.) negative enthalpy change and negative entropy change

C.) positive enthalpy change and negative entropy change

D.) negative enthalpy change and positive entropy change

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Answers (1)

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Matias · Answer 1

D) negative enthalpy and positive entropy,

since the formula G=H-TS when a reaction is spontaneous then G must be negative, and if values of t are low then the only time it is guaranteed to be a negative G value is if H is positive and S is negative