JEE Main 201816 Apr, Morning shiftChemistryMediumChemical Thermodynamics84× since 2002
At 320 K, a gas A₂ is 20% dissociated to A(g). The standard free energy change at 320 K and 1 atm in J mol⁻¹ is approximately : (R = 8.314 JK⁻¹ mol⁻¹; ln2 = 0.693; ln 3 = 1.098)