Question

One mole of acetone requires less heat to vaporise than 1 mol of water. Which of the two liquids has a higher enthalpy of vapourisation?​

Answer 1

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One mole of acetone requires less heat to vaporise than 1 mol of water. Which of the two liquids has a higher enthalpy of vapourisation?

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o Enthalpy of vapourisation is defined as the heat consumed by a liquid to transform into the gaseous form at a certain pressure and temperature.

o 1 mole of acetone requires less heat than 1 mole of water to vaporize. So, water consumes less heat than the same amount of acetone for vapourisation.

Hence, amongst the two liquids, water has a higher enthalpy of vapourisation (consuming higher heat energy).

Therefore, ∆Hvapourisation (water) > ∆Hvapourisation (acetone).