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States of Matter

Short Answer Type

151.

What do you mean by state of dynamic equilibrium?

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152.
Separate portions of chloroform and water at the same temperature are poured on your hands. The chloroform feels colder. Account for this in terms of attractive forces.

The intermolecular forces of attraction in chloroform are weaker than those in water (which also involves hydrogen bonding). As a result, the boiling point of chloroform is lesser. This means that chloroform evaporates faster than water. Consequently, for evaporation, it absorbs more of heat from the hand which gets the feeling of coldness.

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