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Delta(vap)H = 30 kJ mol^(-1) and Delta(v...

`Delta_(vap)H = 30 kJ mol^(-1)` and `Delta_(vap)S = 75 mol^(-1)K^(-1)`. Find the temperature of vapour, at `1` atm.

A

`400K`

B

`350K`

C

`298K`

D

`250K`

Text Solution

Verified by Experts

`DeltaG = DeltaH - T DeltaS`
Gibbs-Helmholtz equation
At equilibrium, `DeltaG = 0`
`DeltaH - T DeltaS`
`T = (DeltaH)/(DeltaS) = (30 xx 10^(3))/(75) = 400K`
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