The Figure Shows a Graph of the Temperature of a Pure

question 220

Multiple Choice

The figure shows a graph of the temperature of a pure substance as a function of time as heat is added to it at a constant rate in a closed container. If L_F is the latent heat of fusion of this substance and L_V is its latent heat of vaporization, what is the value of the ratio L_V/L_F?

• A) 5.0
• B) 4.5
• C) 7.2
• D) 3.5
• E) 1.5

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Definitions:

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