Thermodynamics ...

The value of ∆Hº_f of U₃O₈ is –853.5 KJ mol^–1. Also ∆Hº for the reaction 3UO₂ + O₂ → U₃O₈, is –76.00 KJ. The value of ∆Hº_f of UO₂ is approx –

The heat produced by complete neutralisation of 100 ml of HNO₃ with 300 ml of decimolar KOH solution is 1.713 kJ. The morality of HNO₃ solution will be –

The heats of neutralisation of four acids a, b, c and d when neutralised against a common strong base are 13.7, 9.4, 11.2 and 12.4 Kcal respectively. The weakest among the acids is

A gas is allowed to expand at constant pressure from a volume to 1.0 litre to 10.0 litre against an external pressure of 0.50 atm. If the gas absorbs 250J of heat the surroundings, what are the values of q, w and ∆E ? (Given 1 L atm = 101 J)

The enthalpy of the reaction H₂O₂(l) → H₂O(l) + ½ O₂ (g) is –23.5 Kcal mol^–1. The enthalpy of formation of H₂O₂(l) is

The work done by the system in a cyclic process involving one mole of an ideal monoamotic gas is –50 KJ / cycle. The heat absorbed by the system per cycle is

9.0 gm of H₂O is vaporised at 100^oC and 1 atm pressure. If the latent heat of vaporisation of water is xJ/gm, then ∆S is given by

Equal volumes of monoatomic and diatomic gases at same initial temperature and pressure are mixed. The ratio of specific heats of the mixture (C_P/C_v) will be

A cylinder of gas is assumed to contain 11.2 kg of butane (C₄H₁₀). If a normal family needs 20000KJ of energy per day. The cylinder will last : (Given that for combustion of butane is –2658 KJ)