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The values of DeltaH and DeltaS for a re...

The values of `DeltaH` and `DeltaS` for a reaction are respectively `"30 kJ mol"^(-1)` and `100 KJ^(-1) mol^(-1)`. Then the temperature above which the reaction will become spontaneous is ____

A

300 K

B

30 K

C

100 K

D

`20^@C`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaG=DeltaH-T DeltaS`
At 300 K ,
`DeltaG=30000 "J mol"^(-1) -300 K xx 100 J K^(-1) mol^(-1)`
`DeltaG=0`
above 300 K ,`DeltaG` will be negative and reaction becomes spontaneous.
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