A quantity of steam ( 800 g) at 115oC is condensed, and theresulting water is fr

Question

A quantity of steam ( 800 g) at 115oC is condensed, and theresulting water is frozen into ice at 0oC. How much heat wasremoved?______kcal A sample of neon gas has its volume doubled and itstemperature held constant. What will be the new pressure relativeto the initial pressure? _____P1 Two 2.7 kg physical science textbooks on a bookshelf are 0.32m apart. What is th magnitude of the gravitational attractionbetween the books?_______N A quantity of steam ( 800 g) at 115oC is condensed, and theresulting water is frozen into ice at 0oC. How much heat wasremoved?______kcal A sample of neon gas has its volume doubled and itstemperature held constant. What will be the new pressure relativeto the initial pressure? _____P1 Two 2.7 kg physical science textbooks on a bookshelf are 0.32m apart. What is th magnitude of the gravitational attractionbetween the books?_______N

Explanation / Answer

First question You need to look up the specific heat, c, and latent heat offusion, L, for water. The total heat removed is the heat removed as the steam condensesplus the heat removed as the (now) water is frrozen: Q = m cT + m L T = 115 - 0 = 115 degrees C m = 800 g = 0.8 kg Be sure your units are consistent. Specific heats and heatsof fusion are given in different units (e.g., J/kg-C or cal/g). Also, be sure your answer is in kcal.

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