Section 18.1 states that ordinarily, pressure, volume, and temperature cannot change individually without one affecting the others. Yet when a liquid evaporates, its volume changes, even though its pressure and temperature are constant. Is this inconsistent? Why or why not?
Section 18.1 states that ordinarily, pressure, volume, and temperature cannot change individually without one affecting the others. Yet when a liquid evaporates, its volume changes, even though its pressure and temperature are constant. Is this inconsistent? Why or why not?
Section 18.1 states that ordinarily, pressure, volume, and temperature cannot change individually without one affecting the others. Yet when a liquid evaporates, its volume changes, even though its pressure and temperature are constant. Is this inconsistent? Why or why not?
Expert Solution & Answer
To determine
The fact for change of volume of the liquid that its temperature and pressure remains constant is consistent or not.
Explanation of Solution
In the phase change in of gases the change in one parameter causes the change in other may another parameter remains constant.
For phase change in liquid evaporation takes place. The change of state changes the pressure and temperature of the liquid which is independent of each other. For a condition of phase change temperature remains the same that means the pressure will also be constant.
Thus, it is obvious by the change of volume of vapor the pressure and temperature will not change.
Conclusion: Therefore, the fact for change of volume of the liquid that its temperature and pressure remains constant is consistent.
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Steel train rails are laid in 13.0-m-long segments
placed end to end. The rails are laid on a winter
day when their temperature is -6.0° C.
Part A
How much space must be left between adjacent rails if they are just to touch on a summer day when their
temperature is 32.0°C?
Express your answer with the appropriate units.
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Part B
If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is
32.0°C?
Express your answer in pascals. Enter positive value if the stress is tensile and negative value if the
stress is compressive.
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Part A
In an effort to stay awake for an all-night study
session, a student makes a cup of coffee by first
placing a 200 W electric immersion heater in
0.250 kg of water.
How much heat must be added to the water to raise its temperature from 20.5° C to 95.0°C?
Express your answer in joules.
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How much time is required? Assume that all of the heater's power goes into heating the water.
Express your answer in seconds.
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