For an ideal gas undergoing a reversible isothermal process, which of the following expressions is/a — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

In an isothermal process for an ideal gas, temperature remains constant ($\Delta T = 0$). Since $U$ and $H$ depend strictly on $T$ for ideal gases, $\Delta U = 0$ and $\Delta H = 0$. By the First Law of Thermodynamics, $\Delta U = q + w = 0$, leading to $q = -w$.