Thermodynamics (C)

The equilibrium concentrations of the species in the reaction$A+B⇋C+D$are$2,3,10\mathrm{and}6\mathrm{mol}L^{-1}$respectively at$300K$.$\Delta\,G^{\circ\,}$for the reaction is $\left(R=2\mathrm{cal}/\mathrm{mol}K\right)$

Use the following data : $\(\begin{array}{|c|c|c|}$ $\hline$ $\text$ {Substance } & $\frac{\Delta_f$ $\mathrm{H}^{\ominus}(500$ $\mathrm{~K})}{\mathrm{kJmol}^{-1}}$ & $\frac{\mathrm{~S}^{\ominus}(500$…

$17.0g$ of $\mathrm{NH}_{3}$ completely vapourises at $-33.42^{\circ}C$ and $1$bar pressure and the enthalpy change in the process is $23.4\mathrm{kJ}\mathrm{mol}^{-1}$. The enthalpy change for the vapourisation of…

The enthalpy of formation of ethane $\(\left(\mathrm{C}_2$ $\mathrm{H}_6\right)\)$ from ethylene by addition of hydrogen where the bond-energies of $\(\mathrm{C}-\mathrm{H},$ $\mathrm{C}-\mathrm{C},$…

Two reactions are given below: $2\mathrm{Fe}_{(s)}+\frac{3}{2}O_{2(g)}\rightarrow\,\mathrm{Fe}_{2}O_{3(s)},\Delta\,H^{o}=-822\mathrm{kJ}/\mathrm{mol}$…

A sample of n-octane $(1.14 \mathrm{~g})$ was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is $5 \mathrm{~kJ} \mathrm{~K}^{-1}$. As a result of combustion reaction, the temperature of…

At $25^{\circ}C$, the enthalpy of the following processes are given: $H_{2}(g)+O_{2}(g)\rightarrow\,2\mathrm{OH}(g)\Delta\,H^{o}=78\mathrm{kJ}\mathrm{mol}^{-1}$…

$2.2g$ of nitrous oxide $\left(N_{2}O\right)$ gas is cooled at a constant pressure of $1$ atm from $310K$ to $270K$ causing the compression of the gas from $217.1\mathrm{mL}$ to $167.75\mathrm{mL}$. The change in…

Consider the following data Heat of combustion of $H_{2}(g)=-241.8\mathrm{kJ}\mathrm{mol}^{-1}$ Heat of combustion of $C(s)=-393.5\mathrm{kJ}\mathrm{mol}^{-1}$ Heat of combustion…

$30.4\mathrm{kJ}$ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is $28.4JK^{-1}\mathrm{mol}^{-1}$ at $1\mathrm{atm}$. The melting point of sodium chloride is _______…

If three moles of an ideal gas at $300K$ expand isothermally from $30\mathrm{dm}^{3}$to $45\mathrm{dm}^{3}$ against a constant opposing pressure of $80\mathrm{kPa}$, then the amount of heat transferred is __________J.

For the reaction at $298 \mathrm{~K}, 2 \mathrm{~A}+\mathrm{B} \rightarrow \mathrm{C} . \Delta \mathrm{H}$ $=400 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $\Delta \mathrm{S}=0.2 \mathrm{~kJ} \mathrm{~mol}^{-1}…