For water at 100$$^\circ$$ C and 1 bar,

$$\Delta$$_vap H $$-$$ $$\Delta$$_vap U = _____________ $$\times$$ 10² J mol^$$-$$1. (Round off to the Nearest Integer)

[Use : R = 8.31 J mol^$$-$$1 K^$$-$$1]

[Assume volume of H₂O(l) is much smaller than volume of H₂O(g). Assume H₂O(g) treated as an ideal gas]

A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of the change in internal energy is ____________ J. (Nearest integer)

At 298 K, the enthalpy of fusion of a solid (X) is 2.8 kJ mol^$$-$$1 and the enthalpy of vaporisation of the liquid (X) is 98.2 kJ mol^$$-$$1. The enthalpy of sublimation of the substance (X) in kJ mol^$$-$$1 is _____________. (in nearest integer)

If the standard molar enthalpy change for combustion of graphite powder is $$-$$2.48 $$\times$$ 10² kJ mol^$$-$$1, the amount of heat generated on combustion of 1 g of graphite powder is ___________ kJ. (Nearest integer)