Chemical Thermodynamics — JEE Main PYQs

In conversion of lime-stone to lime,
${\mathrm{CaCO}}_3(\mathrm{s})⟶\mathrm{CaO}(\mathrm{s})+{\mathrm{CO}}_2(\mathrm{g})$
the vales of $\Delta {\mathrm{H}}^{\circ }$ and $\Delta {\mathrm{S}}^{\circ }$ are $+179.1\mathrm{kJ}{\mathrm{mol}}^{-1}$ and …

The standard enthalpy of formation ( ${\Delta }_{\mathrm{f}}{\mathrm{H}}^{\circ }$ ) at 298 K for methane, ${\mathrm{CH}}_4(\mathrm{g})$, is $-74.8\mathrm{kJ}{\mathrm{mol}}^{-1}$. The additional information required to determine the average energy for …

An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If $T_i$ is the initial temperature and $T_f$ is the final temperature, which of the following statements is correct?

The enthalpy changes for the following processes are listed below:
${\mathrm{Cl}}_2(\mathrm{g})=2\mathrm{Cl}(\mathrm{g}),242.3\mathrm{kJ}{\mathrm{mol}}^{-1}$
${\mathrm{I}}_2(\mathrm{g})=2\mathrm{I}(\mathrm{g}),151.0\mathrm{kJ}{\mathrm{mol}}^{-1}$ …

$(\Delta \mathrm{H}-\Delta \mathrm{U})$ for the formation of carbon monoxide (CO) from its elements at 298 K is
( $\mathrm{R}=8.314\mathrm{J}{\mathrm{K}}^{-1}{\mathrm{mol}}^{-1}$ )

For a spontaneous reaction the $\Delta \mathrm{G}$, equilibrium constant ( K ) and ${\mathrm{E}}_{\text{cell }}^{\circ }$ will be respectively

Consider the reaction: ${\mathrm{N}}_2+3{\mathrm{H}}_2⟶2{\mathrm{NH}}_3$ carried out at constant temperature and pressure. If $\Delta \mathrm{H}$ and $\Delta \mathrm{U}$ are the enthalpy and internal energy changes for the reaction, which of the following expres …

A schematic plot of $\ln K_{\mathrm{eq}}$ versus inverse of temperature for a reaction is shown below

The reaction must be

An ideal gas expands in volume from $1\times 10^{-3}{\mathrm{m}}^3$ to $1\times 10^{-2}{\mathrm{m}}^3$ at 300 K against a constant pressure of $1\times 10^5{\mathrm{Nm}}^{-2}$. The work done is

The enthalpies of combustion of carbon and carbon monoxide are -393.5 and $-283\mathrm{kJ}{\mathrm{mol}}^{-1}$ respectively. The enthalpy of formation of carbon monoxide per mole is