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:

Maxillary

Pertaining to the maxilla or the upper jawbone, which holds the upper teeth and plays a key role in the formation of the roof of the mouth, the floor of the orbit, and the sides and floor of the nasal cavity.

Maxilla

The upper jawbone, forming the central part of the face above the mouth.

Meniscus

A crescent-shaped fibrocartilaginous structure in the knee that acts as a shock absorber between the thigh bone and the shin bone.

Menisc

A crescent-shaped fibrocartilaginous anatomical structure that partly divides a joint cavity and can refer specifically to the ones in the knee.