Some solid crystalline compounds slowly change to the gaseous state when left at room temperature in an open container. Which of the following is true about this phenomenon?

It is accompanied by an increase in temperature

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It is accompanied by an absorption of heat by the solid

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It is the result of a chemical reaction with air

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It is best described as fusion

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It is observed only with ice

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Solution

The correct option is B It is accompanied by an absorption of heat by the solid
Some solid crystalline compounds slowly change to the gaseous state when left at room temperature in an open container. It is accompanied by an absorption of heat by the solid. The heat absorbed overcomes intermolecular forces of attraction and helps in change in the state.

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