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15 J is the latent heat for melting of ice, what is the heat of transition from 0^oC ice to 15^oC water if heat of transition from 0^oC water to 15^oC water is 10 J?

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15 J is the latent heat for melting of ice, what is the heat of transition from 0^oC ice to 15^oC water if heat of transition from 0^oC water to 15^oC water is 10 J?

(a) 10 J

(b) 15 J

(c) 25 J

(d) 40 J

I had been asked this question in an online interview.

Enquiry is from Phase Transitions topic in chapter Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

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Best answer
The correct option is (c) 25 J

To explain: H = 15 + 10 = 25 J.

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