The Figure Shows a Graph of the Temperature of a Pure

question 138

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:

Glossopharyngeal Nerve

The ninth cranial nerve, which is responsible for taste and other functions in the tongue and throat.

Spinal Reflex Arc

A neural pathway that mediates a reflex action involving the spinal cord, consisting of at least one sensory neuron and one motor neuron.

Sensory Neuron

A type of neuron that transmits signals from sensory receptors towards the central nervous system, allowing it to perceive stimuli.

Motor Neuron

A type of neuron responsible for conveying impulses from the brain or spinal cord to muscles or glands, causing them to contract or secrete, respectively.