Question 163 of 177

Which of the following compounds will absorb the maximum quantity of heat when dissolved in the same amount of water ? The heats of solution of these compounds at 25°C in kJ/mole of each solute is given in brackets [AMU (Engg.) 2000]

(1) HNO3(ΔH=33)

(2) KCl(ΔH=+17.64)

(3) NH4NO3(ΔH=+25.5)

(4) HCl(ΔH=74.1)