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Consider the given data: (a) HCl(g) + 10 H 2 O(l) → HCl.10 H 2 O  H = – 69.01 kJ mol – 1 (b) HCl(g) + 40 H 2 O(l) → HCl.40 H 2 Ο      Η = – 72.79 kJ mol – 1 Choose the correct statement:

1. Dissolution of gas in water is an endothermic process.
2. The heat of solution depends on the amount of solvent.
3. The heat of formation of HCl solu tion is represented by both (a) and (b).
4. The heat of dilution for the HCl (HCl.10 H 2 O to HCl.40 H 2 O) is 3.78 kJ mol – 1 .

Correct answer: The heat of dilution for the HCl (HCl.10 H 2 O to HCl.40 H 2 O) is 3.78 kJ mol – 1 .

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