1.

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 \[{{25}^{o}}C\] in kJ/mole of each solute is given in brackets                [AMU (Engg.) 2000]

A.                 \[HN{{O}_{3}}(\Delta H=-33)\]  
B.                 \[KCl(\Delta H=+17.64)\]
C.                 \[N{{H}_{4}}N{{O}_{3}}\,(\Delta H=+25.5)\]        
D.                 \[HCl\,(\Delta H=-74.1)\]
Answer» D.                 \[HCl\,(\Delta H=-74.1)\]


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