To calculate the amount of work done in joules during reversible isothermal expansion of an ideal gas,the volume must be expressed in

Any series of operations so carried out that at the end,the system is back to its initial state is called:

Adiabatic free expansion of an ideal gas must be

Calculate the work done in the oxidation of one mole $HCl_{(g)}$ at $27^{\circ} C$,according to the reaction: $4 HCl_{(g)} + O_{2_{(g)}} \rightarrow 2 Cl_{2_{(g)}} + 2 H_{2}O_{(g)}$ $(R = 8.314 \ J \ K^{-1} \ mol^{-1})$ (in $J$)

When a solvent is added to a solution,the heat of the solution $...$.

Explain enthalpy changes during phase transformations.