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9 October, 18:44

Choose the correct statement regarding the behavior of water.

a. The water phase with the highest heat capacity is gas vapor.

b. The liquid-to-vapor phase change of water requires less energy than the ice-to-liquid phase change.

c. The water phase with the highest heat capacity is solid ice.

d. The energy required to evaporate 1 kg of liquid water equals the energy released when 1 kg of water vapor condenses into liquid.

e. The water phase with the smallest temperature increase when adding 10 kcal of heat is solid ice. Tries 0/2

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  1. 9 October, 19:56
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    d. The energy required to evaporate 1 kg of liquid water equals the energy released when 1 kg of water vapor condenses into liquid.

    Explanation:

    Hello,

    Since we're considering the same amount of water, the vapor phase has a higher energy content than the liquid phase, thus, for the specified amount of water particles (those contained in the given 1 kg) the energy MUST be same when taking them either to a gaseous phase or to a liquid phase, the only difference is the sign which is negative from gaseous to liquid (heat withdrawal) and positive from liquid to gaseous (heat adding).

    Best regards.
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