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When a 4.00-g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of 1.797 kJ·K–1, the temperature decreases by 0.400 K. Calculate the molar heat of solution of KCN.

  • chemistry -

    q = 1.797 kJ/K x 0.4 K = ? kJ.
    q in kJ/g = q/4.00
    q in kJ/mol = (q/4.00) x molar mass KCN.

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