A chemistry problem by Gandhali Rangan

Chemistry Level 1

The above figure shows the cross sectional shape of water, ethanol and pentane when you drop an equal volume of each liquid on a glass plate. Which of the following orders regarding Δ H vapor \Delta H_{\text{vapor}} is correct?

Ethanol > Pentane > Water Water > Penthane > Ethanol Ethanol > Water > Pentane Water > Ethanol > Penthane

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1 solution

Bernardo Sulzbach
Jun 25, 2014

The difference in the shape is due to the intermolecular attraction and

Δ H vapor \Delta{}\text{H}_{\text{vapor}} is proportional to the strength of these intermolecular interactions.

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