in which case(s) must a reaction be NONSPONTANEOUS at all temperatures? A) delta
ID: 1018433 • Letter: I
Question
in which case(s) must a reaction be NONSPONTANEOUS at all temperatures? A) delta H is positive, delta S is positive B) delta H is 0, delta S is negative C) delta S is 0, delta H is positive D) delta H is negative, delta S is positive E) none of thesein which case(s) must a reaction be NONSPONTANEOUS at all temperatures? A) delta H is positive, delta S is positive B) delta H is 0, delta S is negative C) delta S is 0, delta H is positive D) delta H is negative, delta S is positive E) none of these
in which case(s) must a reaction be NONSPONTANEOUS at all temperatures? A) delta H is positive, delta S is positive B) delta H is 0, delta S is negative C) delta S is 0, delta H is positive D) delta H is negative, delta S is positive E) none of these
Explanation / Answer
A reaction is non spontaneous if deltaG ( Gibbs free energy change is +ve)
deltaG = deltaH- TdeltaS, So for making deltaG +ve
1. deltaH is to be +Ve or Zero, deltaS has to be -ve. ( Choice B)
2, Even deltaS is Zero and deltaH is +ve makes delta G +ve ( Choice C)
Rest of the choices make deltaG -ve.
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