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14.3 Exercise 21

Avg difficulty 2.5

How many grams of coffee must evaporate from 350 g of coffee in a 100-g glass cup to cool the coffee from 95.0ºC\text{95} . 0º \text{C} to 45.0ºC\text{45} . 0º \text{C}? You may assume the coffee has the same thermal properties as water and that the average heat of vaporization is 2340 kJ/kg (560 cal/g). (You may neglect the change in mass of the coffee as it cools, which will give you an answer that is slightly larger than correct.)

OpenStax College Physics 2e, 14.3 Phase Change and Latent Heat, exercise 21

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.