A process will be spontaneous at all temperatures if : (1) ΔH < 0 a

1.	A process will be spontaneous at all temperatures if : (1) ΔH < 0 and ΔS > 0 (2) ΔH < 0 and ΔS < 0 (3) ΔH > 0 and ΔS < 0 (4) ΔH > 0 and ΔS > 0
Answer» Correct option (1) ΔH < 0 and ΔS > 0 Explanation: At constant P and T and for the process to be spontaneous. We should have ΔG = –ve and we know that ΔG = ΔH – TΔS If ΔH = –ve and ΔS = + ve then at all the temperature the process will be spontaneous

A process will be spontaneous at all temperatures if : (1) ΔH < 0 and ΔS > 0 (2) ΔH < 0 and ΔS < 0 (3) ΔH > 0 and ΔS < 0 (4) ΔH > 0 and ΔS > 0

Answer»

Correct option (1) ΔH < 0 and ΔS > 0

Explanation:

At constant P and T and for the process to be spontaneous.

We should have ΔG = –ve

and we know that

ΔG = ΔH – TΔS

If ΔH = –ve and ΔS = + ve then at all the temperature the process will be spontaneous

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A process will be spontaneous at all temperatures if : (1) ΔH &lt; 0 and ΔS &gt; 0 (2) ΔH &lt; 0 and ΔS &lt; 0 (3) ΔH &gt; 0 and ΔS &lt; 0 (4) ΔH &gt; 0 and ΔS &gt; 0

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A process will be spontaneous at all temperatures if : (1) ΔH < 0 and ΔS > 0 (2) ΔH < 0 and ΔS < 0 (3) ΔH > 0 and ΔS < 0 (4) ΔH > 0 and ΔS > 0