Statement 1: Water kept in a wide shallow dish evaporates faster than the same mass of water in a narrow beaker at the same temperature.
Statement 2: A larger surface area exposes more molecules at the liquid–air boundary, from where they can escape into the vapour phase.

Question

Statement 1: Water kept in a wide shallow dish evaporates faster than the same mass of water in a narrow beaker at the same temperature.

Statement 2: A larger surface area exposes more molecules at the liquid–air boundary, from where they can escape into the vapour phase.

TestHub · Accepted Answer

Statement I is correct: rate of evaporation is proportional to surface area at fixed T. Statement II is correct, and it is precisely why: evaporation occurs only from the surface, so the dish presents many more escapable surface molecules per unit time than the beaker. II explains I. Ans: (a).

Chemistry - Ideal Gas Question with Solution | TestHub

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