Thermodynamics

In a cyclic $p V$ process forming $A$ square loop from $(p=1 \mathrm{~atm}, V=2 \mathrm{~L})$ to $(p=3 \mathrm{~atm}$, $V=4 \mathrm{~L})$, Then, the net heat absorbed by the gas is

The bond dissociation energies of $A_2, B_2$ and $A B$ are in the ratio $1: 4: 2$. If $\Delta H$ for formation of $A B$ from $A_2$ and $B_2$ is $-100 \mathrm{~kJ} / \mathrm{mol}$, calculate the bond dissociation energy of $B_2$.

What would be the amount of heat absorbed in the cyclic process shown below?

The temperature of \(K\) at which \(\Delta G=0\), for a given reaction with \(\Delta H=-20.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\) and \(\Delta S=-50.0 \mathrm{~JK}^{-1} \mathrm{~mol}^{-1}\) is

A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide. If \(\Delta H\) is the enthalpy change and \(\Delta E\) is the change in internal energy, then

The value of enthalpy change \((\Delta H)\) for the reaction \(\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}(l)+3 \mathrm{O}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{CO}_2(\mathrm{~g})+ 3 \mathrm{H}_2 \mathrm{O}(l)\), at \(27^{\circ} \mathrm{C}\) i...

In an adiabatic process, no transfer of heat takes place between system and surrounding. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following.

Standard entropy of X2, Y2 and XY3 are 60, 40 and 50 JK\(-\)1mol\(-\)1, respectively. For the reaction, \(\frac{1}{2}\)X2 + \(\frac{3}{2}\)Y2 \(\to\) XY3, \(\Delta\)H = \(-\)30 kJ, to be at equilibrium, the temperature will be

The incorrect expression among the following is

For the complete combustion of ethanol, \({C_2}{H_5}OH(I) + 3{O_2}(g) \to 2C{O_2}(g) + 3{H_2}O(I)\), the amount of heat produced as measured in bomb calorimeter is 1364.47 kJ mol\(-\)1 at 25\(^\circ\)C. Assuming ideality the enthalpy of com...

SI unit of Boltzmann's constant is

The enthalpies of combustion of carbon and carbon monoxide in excess of oxygen at 298 K and constant pressure are \(-\)393.5 kJ/mol and \(-\)280.0 kj/mol respectively. The heat of formation of carbon monoxide at constant volume is

At the top of a mountain the thermometer reads 0\(^\circ\)C and the barometer reads 710 mm Hg. At the bottom of the mountain the temperature is 30\(^\circ\)C and the pressure is 760 mm Hg. The ratio of the density of air at the top to that ...

Which of the following statement is correct?