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For the reaction 2SO2(g) + O2(g) hArr 2S...

For the reaction `2SO_2(g) + O_2(g) hArr 2SO_3(g)` at 300K, the value of `DeltaG^@` is - 690.9R. The equilibrium constant value for the reaction at that temperature is (R is gas constant)

A

`10 "atm"^(-1)`

B

10 atm

C

10

D

1

Text Solution

Verified by Experts

The correct Answer is:
A
`2SO_(2)(g)+O(g) hArr2SO_(3)(g),DeltaG^(Theta)=-690.9RT` = 300 K
`DeltaG^(Theta)=-RT` ln K
or,- 690.9 `R =- R xx 300 xx` ln K
or , `ln K = (690.9)/300 =2.303`
`2.303 log K = 2.303`
`K=10^(1) =10`
Unit of K
`K=(atm)^(Deltan)`
`=(atm)^(2-3)`
`="atm"^(-1)`
`:. K = 10 "atm"^(-1)`
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