Thermodynamics

A: Entropy of a perfect crystalline solid at absolute zero approaches zero.B: For spontaneity of a reaction, $T\Delta S > \Delta H$.Among the two statements given above, identify the correct answer from the options given below.

Which of the following is a correct statement for a thermodynamic system?

A gas can be taken from A to B via two different paths ACB and ADB.When path ACB is used, $60$ J of heat flows into the system and $30$ J of work is done by the system. If path ADB is used, work done by the system is $10$ J.The heat flow in...

Identify the incorrect statements among the following:
(a) All enthalpies of fusion are positive
(b) The magnitude of enthalpy change does not depend on the strength of the intermolecular interactions in the substance undergoing phase trans...

Which one of the following reactions has $\Delta \mathrm{H}=\Delta \mathrm{U}$ ?

Given below are two statements.
Statement-I : Adiabatic work done is positive when work is done on the system and internal energy of the system increases.
Statement - II : No work is done during free expansion of an ideal gas.
In the light ...

From the diagram $(Z)=\frac{V_{\text {real }}}{V_{\text {ideal }}}$

$\Delta_r H$ for the reaction, $C \rightarrow A$ is

Temperature of \(25^{\circ} \mathrm{C}\) in Fahrenheit and Kelvin scale respectively are

Lattice enthalpy for \(\mathrm{NaCl}\) is \(+788 \mathrm{~kJ} \mathrm{~mol}^{-1}\) and \(\Delta H_{\text {hyd }}^{\circ}=-784 \mathrm{~kJ} \mathrm{~mol}^{-1}\). Enthalpy of solution of \(\mathrm{NaCl}\) is

A gas at a pressure of \(2 \mathrm{~atm}\) is heated from \(25^{\circ} \mathrm{C}\) to \(323^{\circ} \mathrm{C}\) and simultaneously compressed of \(\frac{2}{3}\)rd of its original value. Then the final pressure is

The work done when 2 moles of an ideal gas expands rèversibly and isothermally from a volume of \(1 \mathrm{~L}\) to \(10 \mathrm{~L}\) at \(300 \mathrm{~K}\) is
(\(R=0.0083 \mathrm{~kJ} \mathrm{~K} \mathrm{~mol}^{-1}\))

When the same quantity of heat is absorbed by a system at two different temperatures \(T_1\) and \(T_2\), such that \(T_1>T_2\), change in entropies are \(\Delta S_1\) and \(\Delta S_2\) respectively. Then

The reaction in which \(\Delta H=\Delta U\) is

A reaction has both $\Delta H$ and $\Delta S$ -ve. The rate of reaction