1.

If an endothermic reaction occurs spontaneously at constant temperature T and Pressure P, then whicch of the following is true

Answer»

`DeltaG gt 0`
`DeltaH lt 0`
`DeltaS gt 0`
`DeltaS lt 0`

Solution :The thermodynamic QUANTITY of the system, the decrease in whose value during a process is equal to useful work done by the system, i.e. `DeltaG=DeltaH-TDeltaS`, where H = enthalpy, S= ENTROPY and T= absolute temperature. If an ENDOTHERMIC REACTION occurs spontaneously i.e. `DeltaH=+ve` then for reaction to be spontaneous `DeltaG` should be NEGATIVE that is only possible when `DeltaS gt 0` at constant temperature and pressure.


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