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If Cp of liquid water is 10 J/^oC, what is the enthalpy change of water at standard conditions from – 10^oC to 0^oC?

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If Cp of liquid water is 10 J/^oC, what is the enthalpy change of water at standard conditions from – 10^oC to 0^oC?

(a) 10 J

(b) 50 J

(c) 100 J

(d) Cannot be determined

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The question is from Phase Transitions in portion Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

1 Answer

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Right option is (d) Cannot be determined

Easiest explanation: Since the phase of water from – 10^oC to 0^oC is solid ice, but Cp of liquid water is given, so it cannot be determined.

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