If $C$ (diamond) $\rightarrow C$ (graphite ) $+X \mathrm{~kJ} \mathrm{~mol}^{-1}$ $\mathrm{C}($ diamond $)+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{YkJmol}^{-1}$ C (graphite) $+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{ZkJmol}^{-1}$ at constant temperature. Then

Total enthalpy change for freezing of 1 mol of water at ${10^\circ}{\rm{C}}$ to ice at $ - {10^\circ }{\rm{C}}$ is
(Given: $...

One mole of an ideal gas expands isothermally and reversibly from $10{\rm{d}}{{\rm{m}}^3}$ to $20{\rm{d}}{{\rm{m}}^3}$ at 300 K. $\Delta {\rm{U}},{\rm{q}}$ and work done in the process...

Let us consider a reversible reaction at temperature, T.
In this reaction, both $\Delta {\rm{H}}$ and $\Delta {\rm{S}}$ were observed to have positive values. If...

An ideal gas undergoes a cyclic transformation starting from the point $A$ and coming back to the same point by tracing the path $...

Given : $\Delta {{\rm{H}}^ \ominus }{\rm{ sub }}$ $[{\rm{C }}({\rm{graphite}})] = 710\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$
${\Delta _{{\rm{C}} - {\rm{H}}}}{{\rm{H}}^ \ominus } = 414\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$
$...

Which of the following properties will change when system containing solution 1 will become solution 2?

$\mathrm{S}(\mathrm{g})+\frac{3}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+2 x \mathrm{kcal}$ $\mathrm{SO}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{3}(\mathrm{~g})+y \mathrm{kcal}$ 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...