Five moles of an ideal gas is expanded isothermally from 5 dm^3 to 5 m^3 at 300 K. Which of the foll — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

In an isothermal expansion of an ideal gas, Δ U = 0 and Δ H = 0. However, work is done by the gas (w < 0), so it must absorb heat from surroundings (q = -w > 0) to maintain constant temperature. Thus, option a is incorrect.