MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and ThermochemistryGibb’s Energy and Spontaneity
For the gas phase reaction, PCl g PCl g Cl g Which of the following conditions are correct?
A.H
B.H✓ Correct
C.H
D.H
Explanation
g H U n RT and G H T S for a spontaneous process, must be negative. 5 3 2 PCl g PCl g Cl g In this reaction, g n = 2 – 1 = 1 Thus, H is positive, i.e., > 0 If is positive, then to maintain the value of G negative, S should be positive, i.e. S 0 ,
Practice More Like This
Take chapter-wise tests, track your progress, and master Thermodynamics and Thermochemistry.
Start Free Practice →