Question

Calculate the change in the entropy of 2.0 kg of water when it is converted from liquid to vapor.

Heat of fusion for water is 334*10^3 (J/kg)

Boiling pint of water is 373.15 K

Heat of vaporization for water is 2256*10^3 (J/kg)

Answer 1

(If the phase change occurs at boiling point, then the problem is solved as follows:

In case, If you are provided a initial and final temperature, please let me know via comments)

Given that:

Boiling point of water, T = 373.15 K

Heat of fusion of water, H_vap = 2256 x 10³ J/kg

Mass of water, m = 2 kg

Therefore, Change in entropy is given by:

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