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Which is the correct matching of heat exchange in evaporation and condensation?

Answer and explanation

Correct answer: Evaporation absorbs heat and condensation releases heat

Correct answer: C. Evaporation is the change of liquid water into water vapour. To escape from the liquid surface, water molecules need energy, so the liquid absorbs heat from its surroundings. This energy is called latent heat because it is used for the change of state rather than immediately raising temperature. Condensation is the reverse process: water vapour changes into liquid water. Molecules lose energy and the previously stored latent heat is released to the surrounding air or surface. Therefore, evaporation absorbs heat while condensation releases heat. A is reversed and gives the heat directions incorrectly. B is wrong because both processes involve latent heat. D is unrelated: these are changes of state, not processes that only create gravitational energy. Memory cue: “Evaporation takes; condensation gives.”

Related tags

Latent HeatEvaporationCondensationHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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