Embibe Experts Solutions for Chapter: Chemical Thermodynamics and Energetics, Exercise 1: MHT-CET 2017

Which of the following is NOT an intensive property?

Calculate the work done during combustion of $0.138\mathrm{ }\mathrm{kg}$ of ethanol, $\left({\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\left(\mathrm{l}\right)\right)$ at at $300 \mathrm{K. }$Given: $\mathrm{R}=8.314\mathrm{ }{\mathrm{Jk}}^{-1}\mathrm{ }{\mathrm{mol}}^{-1}$ and molar mass of ethanol $=46\mathrm{ }\mathrm{g}\mathrm{ }{\mathrm{mol}}^{-1}$.

Identify the equation in which change in enthalpy is equal to change in internal energy

Two moles on an ideal gas is expanded isothermally and reversibly at 300 K form 1 L to 10 L. The enthalpy change in KJ is

If $C\left(s\right)+O_2\left(g\right)\to C{O}_2\left(g\right),\Delta H=-X,$
$CO\left(g\right)+\frac{1}{2}{O}_2\left(g\right)\to C{O}_2\left(g\right),\Delta H=-Y,$
Calculate ${\Delta }_{f}H$ for $C{O}_{\left(g\right)}$ formation

Enthalpy of fusion and enthalpy of vaporization for water respectively are $6.01 \mathrm{kJ} {\mathrm{mol}}^{-1}$ and $45.07 \mathrm{kJ} {\mathrm{mol}}^{-1}$ at $0°\mathrm{C}$ what is enthalpy of sublimation at $0°\mathrm{C}$?

For the following reaction

${\mathrm{Fe}}_2{\mathrm{O}}_{3\left(\mathrm{s}\right)}+3{\mathrm{CO}}_{\left(\mathrm{g}\right)}⟶2{\mathrm{Fe}}_{\left(\mathrm{s}\right)}+3{\mathrm{CO}}_{2\left(\mathrm{g}\right)} \mathrm{\Delta H}°=-29.8 \mathrm{kJ}$ and $\mathrm{\Delta S}°=15 {\mathrm{JK}}^{-1}$. What is the value of ${\mathrm{\Delta S}}_{\left(\mathrm{total}\right)}$ at $298 \mathrm{K}$?

For a reaction $\mathrm{\Delta H}=-30\mathrm{kJ}$ and $\mathrm{\Delta S}=-45 \mathrm{J} {\mathrm{K}}^{-1},$ at what temperature reaction changes from spontaneous to non-spontaneous ?