ThermochemistryHard

Question

Which of the following salts shall cause more cooling when one mole of the salt is dissolved in the same amount of water? (Integral heat of solution at 298 K is given for each solute.)

Options

A.KNO3: ΔH = 35.4 kJ/mol
B.NaCl: ΔH = 5.35 kJ/mol
C.KOH: ΔH = −55.6 kJ/mol
D.HBr: ΔH = −83.3 kJ/mol

Solution

For more cooling, heating absorbed on dissolution should be high.

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