M K Verma Solutions for Chapter: Thermodynamics, Exercise 1: TOPICWISE QUESTIONS

Standard enthalpy of formation $\left({∆}_{\mathrm{f}}{\mathrm{H}}^{\circ }\right)$ for ${\mathrm{CH}}_4$ is $-74.8 \mathrm{kJ} {\mathrm{mol}}^{-1}$, at $298 \mathrm{K}$.  The additional information that will be required to determine the average energy for $\mathrm{C}-\mathrm{H}$ bond formation is

When $10 \mathrm{ml}$ of alkali and $10 \mathrm{ml}$ of a strong acid are mixed. The temperature rises by $5^{°}\mathrm{C}$. If $100 \mathrm{ml}$ of each liquid are mixed, the temperature rise would be:

Find the $\mathrm{\Delta H}$at $358 \mathrm{K}$ for the reaction, ${\mathrm{Fe}}_2{\mathrm{O}}_3 \left(\mathrm{s}\right)+ 3{\mathrm{H}}_2 \left(\mathrm{g}\right)\to 2\mathrm{Fe} \left(\mathrm{s}\right) +3{\mathrm{H}}_2\mathrm{O} \left(l\right)$.

Given that $\mathrm{\Delta H} \text{at} 298 \mathrm{K}=-33.29 \mathrm{kJ} {\mathrm{mol}}^{-1}$ and $\mathrm{Cp}$for ${\mathrm{Fe}}_2{\mathrm{O}}_3 \left(\mathrm{s}\right),$ $\mathrm{Fe} \left(\mathrm{s}\right),{\mathrm{H}}_2\mathrm{O} \left(l\right), \text{and} {\mathrm{H}}_2 \left(\mathrm{g}\right)$are $103.8, 25.1, 75.3 \text{and} 28.8 \mathrm{J} {\mathrm{K}}^{-1} \mathrm{mol}{ }^{-1}$ respectively.

$∆{\mathrm{H}}_{\mathrm{f}}^{°} \text{of} {\mathrm{NF}}_3 \text{is} -113 \mathrm{kJ} {\mathrm{mol}}^{-1}$ and $\mathrm{N}-\mathrm{F}$ bond energy is $273.0 \mathrm{kJ} {\mathrm{mol}}^{-1}$. If  $\mathrm{N}\equiv \mathrm{N} \mathrm{and} \mathrm{F}-\mathrm{F}$ bond energies are in the rates$6:1$, their magnitudes will be:

Bond enthalpies of ${\mathrm{H}}_2$, ${\mathrm{X}}_2$ and $\mathrm{HX}$ are in the ratio of $2:1:2$. If the enthalpy of formation of$\mathrm{HX}$ is $-50 \mathrm{kJ} {\mathrm{mol}}^{-1}$, what would be the bond enthalpy of ${\mathrm{X}}_2$?

The enthalpy of combustion at $25°\mathrm{C}$ of ${\mathrm{H}}_2$, cyclohexene (${\mathrm{C}}_6{\mathrm{H}}_{10}$) and cyclohexane (${\mathrm{C}}_6{\mathrm{H}}_{12}$) are $(-241), (-3800)$ and $(-3920) \mathrm{kJ} {\mathrm{mol}}^{-1}$ respectively. The heat of hydrogenation of cyclohexene is:

If the specific heat of a gas at constant pressure and specific heat of a gas at constant volume is ${\mathrm{C}}_{\mathrm{p}}$ and ${\mathrm{C}}_{\mathrm{v}}$ respectively, then:

A cylinder of gas supplied by Bharat Petroleum is assumed to contain $14 \mathrm{kg}$ butane. If a normal family requires $20000 \mathrm{kJ}$ of energy per day for cooking, butane gas in the cylinder lasts for ..... days?

$({∆}_{\mathrm{c}}\mathrm{H} \text{of} {\mathrm{C}}_4{\mathrm{H}}_{10}=-2658 \mathrm{kJ} {\mathrm{mol}}^{-1})$