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For the reaction: X(2)O(4)(l)rarr2XO(2...

For the reaction:
`X_(2)O_(4)(l)rarr2XO_(2)(g)`
`DeltaU=2.1 cal , DeltaS =20 "cal" K^(-1) "at" 300 K`
Hence `DeltaG` is

A

`2.7Kcal`

B

`-2.7Kcal`

C

`9.3Kcal`

D

`-9.3Kcal`

Text Solution

Verified by Experts

The correct Answer is:
B
Given `DeltaU=2.1Kcal.,DeltaS=20calK^(-1)`
`T=300K`
`:. DeltaH=2.1+2xx(2)/(1000)xx300=2.1+1.2=3.3Kcal`
Now, `DeltaG=DeltaH-TDeltaS`
`=3.3 -300xx(20)/(1000)=-2.7Kcal`
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