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QJEE MAIN 2025
Arrange the following in order of magnitude of work done by the system/on the system at constant temperature. (a) $\left|w_{\text {reversible }}\right|$ for expansion in...
JEE MainChemistryMedium
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QJEE MAIN 2024
If three moles of an ideal gas at 300 K expand isotherrnally from $30dm^3$ to $45dm^3$ against a constant opposing pressure of 80kPa, then the...
JEE MainChemistryMedium
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QJEE MAIN 2025
If $C$ (diamond) $\rightarrow C$ (graphite ) $+X \mathrm{~kJ} \mathrm{~mol}^{-1}$
$\mathrm{C}($ diamond $)+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{YkJmol}^{-1}$
C (graphite) $+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{ZkJmol}^{-1}$
at constant temperature. Then
JEE MainChemistryEasy
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QJEE MAIN 2025
Total enthalpy change for freezing of 1 mol of water at ${10^\circ}{\rm{C}}$ to ice at $ - {10^\circ }{\rm{C}}$ is (Given: $...
JEE MainChemistryMedium
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QJEE MAIN 2025
One mole of an ideal gas expands isothermally and reversibly from $10{\rm{d}}{{\rm{m}}^3}$ to $20{\rm{d}}{{\rm{m}}^3}$ at 300 K. $\Delta {\rm{U}},{\rm{q}}$ and work done in the process...
JEE MainChemistryEasy
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QJEE MAIN 2025
Let us consider a reversible reaction at temperature, T. In this reaction, both $\Delta {\rm{H}}$ and $\Delta {\rm{S}}$ were observed to have positive values. If...
JEE MainChemistryEasy
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QJEE MAIN 2025
Consider the following data : Heat of formation of $\mathrm{CO}_{2}(\mathrm{~g})=-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$ Heat of formation of $\mathrm{H}_{2} \mathrm{O}(\mathrm{l})=-286.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$ Heat of combustion of benzene...
JEE MainChemistryMedium
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QJEE MAIN 2025
An ideal gas undergoes a cyclic transformation starting from the point $A$ and coming back to the same point by tracing the path $...
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