Giancoli's Physics: Principles with Applications, 7th Edition
13
Temperature and Kinetic Theory
Change chapter

13-1: Atomic Theory
13-2: Temperature and Thermometers
13-4: Thermal Expansion
13-5: Gas Laws; Absolute Temperature
13-6 and 13-7: Ideal Gas Law
13-8: Ideal Gas Law in Terms of Molecules; Avogadro's Number
13-9: Molecular Interpretation of Temperature
13-11: Real Gases; Phase Changes
13-12: Vapor Pressure and Humidity
13-13: Diffusion

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 57
Q

# Water is in which phase when the pressure is 0.01 atm and the temperature is

1. $90 ^\circ \textrm{C}$
2. $-20 ^\circ \textrm{C}$
A
1. vapour
2. solid

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VIDEO TRANSCRIPT

This is Giancoli Answers with Mr. Dychko. This is the phase diagram for water, and it looks like at 0.1 atmospheres at 90 degrees Celsius, looks like it's just below this curve here, which means it is a vapor, it's not going to be liquid at 90. At sea level pressure 1 atmosphere, it is liquid, that would be here and that point were it crosses 1 atmosphere in 90 degrees. But as we have it here with 0.1 atmospheres, looks like that corresponds to about there this point here, 90 degrees 0.1 atmospheres, that is in the vapor region. And then part b, at negative 20 degrees Celsius it's going to be definitely solid because here 0 degrees Celsius and negative 28 degrees Celsius puts this about here or so.

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