Giancoli's Physics: Principles with Applications, 7th Edition

14

Heat

Change chapter14-1: Heat as Energy Transfer

14-3 and 14-4: Specific Heat; Calorimetry

14-5: Latent Heat

14-6 to 14-8: Conduction, Convection, Radiation

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

Problem 24

Q

A

$1.6 \textrm{ kg}$

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VIDEO TRANSCRIPT

This is Giancoli Answers with Mr. Dychko. The amount of heat needed to change phase of a certain mass of the substance is the mass times the latent heat of vaporization in this case because it's going from a liquid to a gas. So, we'll divide both sides by *L* to solve for *m*. So, the amount of mass that can turn into gas is going to be the energy absorbed which is 3.4 times 10 to the 5 joules divided by the latent heat of vaporization for oxygen which is 210 times 10 to the 3 joules per kilogram which is about 1.6 kilograms.

COMMENTS

By soja78866 on Mon, 3/11/2019 - 3:34 PM

How did you get 2.1x10^5 j/kg? That number is not in the problem.

By Mr. Dychko on Tue, 4/2/2019 - 7:30 PM

This number is found in a data table 14-3 titled "Latent Heats" on page 397. It's the latent heat of vaporization for oxygen.

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