1.

For a certain process, DeltaH=280 kJ and DeltaS=140 J K^(-1) "mol"^(-1) .What is the minimum temperature at which the process will be spontaneous?

Answer»

2000 K
1200 K
1400 K
1420 K

SOLUTION :Temperature has MINIMUM VALUE at equilibrium i.e., at `DeltaG=0` .
SINCE `DeltaG=DeltaH-TDeltaS, therefore T=(DeltaH)/(DeltaS)`
`T=(280xx10^3)/140` = 2000 K


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