$\mathrm{S}(\mathrm{g})+\frac{3}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+2 x \mathrm{kcal}$ $\mathrm{SO}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+y \mathrm{kcal}$ The heat of formation of $\mathrm{SO}_{2}(\mathrm{~g})$ is given by :

Two vessels A and B are connected via stopcock. The vessel A is filled with...

The bond dissociation enthalpy of $\mathrm{X}_{2} \Delta \mathrm{H}_{\text {bond }}^{\circ}$ calculated from the given data is $\_\_\_\_$ $\mathrm{kJmol}{ }^{-1}$. (Nearest integer) \end{enumerate} $$ \begin{aligned} &...

The effect of temperature on spontaneity of reactions are represented as : The incorrect combinations are:

500 J of energy is transferred as heat to 0.5 mol of Argon gas at 298 K and 1.00 atm . The final temperature and...

The formation enthalpies, $\Delta {{\rm{H}}_{\rm{f}}}^ \ominus $ for ${{\rm{H}}_{({\rm{g}})}}$ and ${{\rm{O}}_{({\rm{g}})}}$ are 220.0 and $250.0\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ , respectively, at 298.15 K, and $...

Standard entropies of ${{\rm{X}}_2},{{\rm{Y}}_2}$ and ${\rm{X}}{{\rm{Y}}_5}$ are 70, 50 and $110{\mkern 1mu} {\rm{J}}{{\rm{K}}^{-1}}{\rm{mo}}{{\rm{l}}^{-1}}$ respectively. The temperature in Kelvin at which the reaction $...

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....

The standard enthalpy and standard entropy of decomposition of ${{\text{N}}_{2}}{{\text{O}}_{4}}$ to $\text{N}{{\text{O}}_{2}}$ are $55.0~\text{kJ}~\text{mo}{{\text{l}}^{{-1}}}$ and $175.0~\text{J}/\text{K}/\text{mol}$ respectively. The standard free energy change for this reaction...

Ice at $-{{5}^{{}^\circ }}\text{C}$ is heated to become vapor with temperature of ${{110}^{{}^\circ }}\text{C}$ at atmospheric pressure. The entropy change associated with this process can...