Which of the following is correct option for free expansion of an ideal gas under adiabatic conditio

1 gm H₂ gas at S.T.P. is expanded so that volume is doubled. Hence work done is -

The lattice enthalpy and hydration enthalpy of four compounds are given below – Compound Lattice ent

Standard enthalpies of formation of O₃, CO₂, NH₃ and HI are 142.2, −393.2, −46.2 and +25.9 kJ mol⁻¹

Consider the following reactions at 1000°C - I. Zn(s) + 1/2 O₂(g) → ZnO(s); ΔG° = −360 kJ mol⁻¹ II.

The value of ΔH° for the reaction Cu⁺(g) + I⁻(g) → CuI(g) is − 446 kJ mol⁻¹. If the ionization energ