# Chemistry

When a 3.00-g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of 1.123 kJ·K–1, the temperature decreases by 0.480 K. Calculate the molar heat of solution of KCN.

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1. q = mass sample x Ccal x delta T.
Divide by 3 to obtain q/1 g sample, and multiply by molar mass to find q for 1 mol KCN. That will give you q in kJ/mol.

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