A solid sample of a pure compound is contained in a closed, well-insulated conta
ID: 1267699 • Letter: A
Question
A solid sample of a pure compound is contained in a closed, well-insulated container. Heat is added at a constant rate and the sample temperature is recorded. The resulting data is graphed in the figure. Which of the following conclusions is justified from the graph shown?
The heat of fusion is greater than the heat of vaporization.
After 20 minutes the solid was all liquid.
After 5 minutes the sample was a mixture of solid and liquid.
The heat capacity of the solid phase was greater than that of the liquid phase.
The sample never boiled.
a)The heat of fusion is greater than the heat of vaporization.
b)After 20 minutes the solid was all liquid.
c)After 5 minutes the sample was a mixture of solid and liquid.
d)The heat capacity of the solid phase was greater than that of the liquid phase.
e)The sample never boiled.
Explanation / Answer
After 5 minutes the sample was a mixture of solid and liquid.
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