(in J), when system is taken from State 1 to State 2, is — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

From State 1 to 2, the liquid is isothermally compressed. Since internal energy of the liquid depends only on temperature, $\Delta U = 0$. Enthalpy change $\Delta H = \Delta U + V\Delta P = 0 + 0.9\text{ L} \times (760 - 532)\text{ mmHg} \times \frac{1\text{ atm}}{760\text{ mmHg}} = 0.9 \times \frac{228}{760} = 0.27\text{ L-atm}$. Converting to Joules gives $0.27 \times 100\text{ J} = 27\text{ J}$.