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a) A 1.800 g sample of solid phenol (C6H5OH) was burned in excess oxygen in a bomb calorimter whos heat capacity is 11.66 kj/°C. The temprature increased from 21.36°C to 26.36°C. Determien the molar enthalpy change and molar internal energy change for this reaction.

b) A certain gas is found to obey the equation of satte ( P + n A) V= nRT, where A and R are constants. Derive expression for the work done in an isothermal reversible expansion of this gas.

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