A sample of a diatomic perfect gas is found to have a molar heat capacity that changes with temperature given by Cp,m/ JK-1 = 29.96 + 4.18 x 10⁻³T - 1.67 x 10⁵T⁻². Calculate q, w, ΔU and ΔH for 2.5 moles of gas when the temperature is decreased from 100⁰C to 25⁰C at constant volume.

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