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When 1.00 g of solid NH4Cl is dissolved in 25.00 g of water contained in a cofee cup calorimeter, both reagents initially being at 25.00 C the temperature falls to 22.4 C. Assuming that the heat capacity of the ammonuim chloride solution is 4.18J/gc, calculate the heat (enthalpy) of the solution NH4Cl, (a) in J/g and (b) in kj/mol.

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