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Total enthalpy change for freezing of 1 mol of water at 10°C to ice at –10°C is_______ (Given : Δ fus H = x kJ/mol C p (H 2 O ) ( l ] = y J mol –1 K –1 C p (H 2 O(s)] = zJ mol –1 K –1

1. x – 10y – 10z
2. 10(100x + y + z)
3. –x – 10y – 10z
4. –10(100 x + y + z)

Correct answer: –10(100 x + y + z)

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