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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker
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A sample of solid carbon dioxide at a pressure of 5707 kPa

Chapter 17, Problem 55P

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QUESTION:

A sample of solid carbon dioxide at a pressure of 5707 kPa has a temperature just below the freezing point. Refer to Figure 17–29 to answer the following questions. (a) What phase changes occur if the temperature of the system is increased while the pressure is held constant? (b) Suppose, instead, that the temperature of the system is held constant just below the freezing point while the pressure is decreased. What phase changes occur now?

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QUESTION:

A sample of solid carbon dioxide at a pressure of 5707 kPa has a temperature just below the freezing point. Refer to Figure 17–29 to answer the following questions. (a) What phase changes occur if the temperature of the system is increased while the pressure is held constant? (b) Suppose, instead, that the temperature of the system is held constant just below the freezing point while the pressure is decreased. What phase changes occur now?

ANSWER:

Step 1 of 3

The phase diagram for carbon dioxide shows the pressures and temperatures for which carbon dioxide is in the solid, liquid, and vapor phases. The sample of dry ice begins at , just below the melting temperature.

Observe the phase changes that occur when the temperature increases and pressure decreases.

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