When enthalpy and entropy change for a chemical reaction are $-2.5 \times 10^3 \ cal$ and $7.4 \ cal \ K^{-1}$ respectively,predict if the reaction at $298 \ K$ is:
- ASpontaneous
- BReversible
- CIrreversible
- DNon-spontaneous
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Similar Questions
For a spontaneous reaction at all temperatures,which of the following is correct?
For independent processes at $300 \ K$,determine the number of non-spontaneous processes from the following table:
Process $\Delta H \ (kJ \ mol^{-1})$ $\Delta S \ (J \ K^{-1} \ mol^{-1})$ $A$ $-25$ $-80$ $B$ $-22$ $40$ $C$ $25$ $-50$ $D$ $22$ $20$
| Process | $\Delta H \ (kJ \ mol^{-1})$ | $\Delta S \ (J \ K^{-1} \ mol^{-1})$ |
|---|---|---|
| $A$ | $-25$ | $-80$ |
| $B$ | $-22$ | $40$ |
| $C$ | $25$ | $-50$ |
| $D$ | $22$ | $20$ |
The relation between $\Delta G$ and $\Delta H$ is
Easy
View SolutionValues of $\Delta H$ and $\Delta S$ for five different reactions are given below. On the basis of these values,predict which one of these will be spontaneous at all temperatures.
Reaction $\Delta H \ (kJ \ mol^{-1}) / \Delta S \ (J \ K^{-1} \ mol^{-1})$ $I$ $+98.0, +14.8$ $II$ $-55.5, -84.6$ $III$ $+28.3, -17.0$ $IV$ $-40.5, +24.6$ $V$ $+34.7, 0.0$
| Reaction | $\Delta H \ (kJ \ mol^{-1}) / \Delta S \ (J \ K^{-1} \ mol^{-1})$ |
|---|---|
| $I$ | $+98.0, +14.8$ |
| $II$ | $-55.5, -84.6$ |
| $III$ | $+28.3, -17.0$ |
| $IV$ | $-40.5, +24.6$ |
| $V$ | $+34.7, 0.0$ |
Medium
View SolutionWhat will be the value of $\Delta G$ for the melting of ice at $283 \ K$?
Medium
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