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DeltaH and DeltaS for the system H2O((l)...

`DeltaH` and `DeltaS` for the system `H_2O_((l))hArr H_2O_((g))` at `1atm` are `40.63 kJ mol^(-1)` and `108.8 JK^(-1) mol^(-1)` respectively. The temperature at which the rates of forward and backward reactions will be same:

A

`273.4 K`

B

`325.4 K`

C

`373.4 K`

D

`225.4 K`

Text Solution

Verified by Experts

The correct Answer is:
C
`:' DeltaG=DeltaH-TDeltaS`
`DeltaG=0` at equilibrium
`DeltaS=108.8 Jk^(-1) mol^(-1)`
`=0.1088 k Jmol^(-1)`
`:. 0=40.63-Txx0.1088`
or `T=373.4 K`
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