1.

A chemical reaction is spontaneous at 298 K but non-spontaneous at 350 K. Which one of the following is true for the reaction ?

Answer»

`{:(Delta G,Delta H,Delta S),(-,-,+):}`
`{:(Delta G,Delta H,Delta S),(+,+,+):}`
`{:(Delta G,Delta H,Delta S),(-,+,-):}`
`{:(Delta G,Delta H,Delta S),(-,-,-):}`

SOLUTION :`Delta G (-) = Delta H (-) - T Delta S (+ve)`
At high temperature, second TERM will have high +ve value and REACTION will be non-spontaneous.


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