For a chemical reaction to be non-spontaneous at any temperature, which of the following conditions must be met?

Respuesta :

Answer:

Hi, the given question has some missing part. Complete question is: " For a chemical reaction to be non-spontaneous at any temperature, which of the following conditions must be met?

A. ΔS° > 0, ΔH° > 0

B. ΔS° > 0, ΔH° < 0

C. ΔS° < 0, ΔH° < 0

D. ΔS° < 0, ΔH° > 0

E. All reactions are spontaneous at some temperature."

Option (D) is correct.

Explanation:

We know that, [tex]\Delta G^{0}=\Delta H^{0}-T\Delta S^{0}[/tex]

Where T represents temperature in kelvin scale. Hence it is always positive.

For a non-spontaneous reaction, [tex]\Delta G^{0}[/tex] should be positive.

If [tex]\Delta S^{0}< 0[/tex] then [tex]-T\Delta S^{0}> 0[/tex] at any T value.

Hence [tex]\Delta G^{0}> 0[/tex] for any value of T if both [tex]\Delta H^{0}[/tex] and [tex]-T\Delta S^{0}[/tex] are greater than zero.

So, option (D) is correct.

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