MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and ThermochemistryPrevious Year Questions
For a given reaction, ∆H = 35.5 kJ mol–1 and ∆S = 83.6 J K–1 mol–1. The reaction is spontaneous at (Assume that ∆H and ∆S do not vary with temperature.) (NEET 2017)
A.T > 425 K✓ Correct
B.all temperatures
C.T > 298 K
D.T < 425 K
Explanation
For a spontaneous reaction, ∆G < 0 i.e., ∆H – T∆S < 0 H T S 35.5 1000 T 424.6 425K 83.6 x ∴ T > 425 K