A reaction, A + B → C + D + q is found to ...

NCERT Class XI Chemistry Thermodynamics Solutions

Question : 6 of 22

Marks: +1, -0

A reaction, A + B → C + D + q is found to have a positive entropy change.

The reaction will be

(a) possible at high temperature

(b) possible only at low temperature

(d) possible at any temperature.

Solution:

(d) : A + B → C + D + q, ΔS = +ve

Here, ΔH = –ve; ΔG = ΔH – TΔS

For reaction to be spontaneous, ΔG should be –ve.

As ΔH = –ve and ΔS is +ve, ΔG will be –ve at any temperature.

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