One mole of an ideal monoatomic gas undergoes adiabatic free expansion from 2 to 20 dm^3, 300 K. The — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

In adiabatic free expansion, q=0, w=0, so Δ U=0 and temperature remains constant (300 K). S is state function, so Δ S equals that of isothermal reversible expansion: Δ S = n * R * ln(V2/V1) = 1 * R * ln(20/2) = R ln 10.