ΔG=ΔH−TΔS
For spontaneous,
ΔG<0
ΔH−TΔS<O
ΔS>TΔH
ΔS>450K30×103Jmol−1
ΔS>66.6Jmol−1K−1 (Check by options)
So, option (1) , i.e. 70 Jmol−1 K−1 satisfies it.
NEET UG 2020 — Chemistry Physical Chemistry
If for a certain reaction ΔrH is 30kJmol−1 at 450K, the value of ΔrS (in JK−1mol−1) for which the same reaction will be spontaneous at the same temperature is
Held on 30 Apr 2020 · Verified 9 Jul 2026.
70
−33
33
−70
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