$$\begin{aligned} & \mathrm{S}(\mathrm{~g})+\frac{3}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{SO}_3(\mathrm{~g})+2 x \mathrm{kcal} \\ & \mathrm{SO}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{SO}_3(\mathrm{~g})+y \mathrm{kcal} \end{aligned}$$
The heat of formation of $\mathrm{SO}_2(\mathrm{~g})$ is given by :
Which of the following mixing of 1 M base and 1 M acid leads to the largest increase in temperature?
Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is spontaneous at boiling point of water. Choose the correct option.
The effect of temperature on spontaneity of reactions are represented as :
| $\Delta$H | $\Delta$S | Temperature | Spontaneity | |
|---|---|---|---|---|
| (A) | $+$ | $-$ | any T | Non spontaneous |
| (B) | $+$ | $+$ | low T | spontaneous |
| (C) | $-$ | $-$ | low T | Non spontaneous |
| (D) | $-$ | $+$ | any T | spontaneous |
The incorrect combinations are :
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