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Heat of Reaction

When heat is ...

Question

When heat is added to a solid at a constant rate, the temperature will remain constant for some time at the _______ of solid.

A

melting point

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B

boiling point

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C

sublimating point

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D

flash point

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Solution

The correct options are
B melting point
C sublimating point
Solid has a melting point or sublimation point. At this point, heat absorbed is used for the transition of phase. Hence heat is added to a solid at a constant rate, the temperature will remain constant for some time at the melting or sublimation of solid.

Hence, the correct options are $A$ and $C$

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