A refrigerator works by taking advantage of the ΔH of phase changes during the vaporization and condensation of Freon-12 (CCl2F2).What is the sign of the ΔH for each of the following changes? Answer with a word not a mathematical symbol.CCl2F2 (g) → CCl2F2 (l) -- negative H2O (l) → H2O (s) -- negative CCl2F2 (l) → CCl2F2 (g) -- positive Now imagine that you want to make some ice in the freezer of this refrigerator. How many grams of Freon-12 (CCl2F2) must be vaporized, to remove enough heat to freeze 397.4 grams of water at 0°C to ice at 0°C? The ΔHfusion for water = 6.01 kJ/mol, and the ΔHvap for Freon-12 = 17.4 kJ/mol.

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Answered: Now imagine that you want to make some…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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A refrigerator works by taking advantage of the ΔH of phase changes during the vaporization and condensation of Freon-12 (CCl₂F₂).
What is the sign of the ΔH for each of the following changes? Answer with a word not a mathematical symbol.

CCl₂F₂ (g) → CCl₂F₂ (l) -- negative

H₂O (l) → H₂O (s) -- negative

CCl₂F₂ (l) → CCl₂F₂ (g) -- positive

Now imagine that you want to make some ice in the freezer of this refrigerator. How many grams of Freon-12 (CCl₂F₂₎must be vaporized, to remove enough heat to freeze 397.4 grams of water at 0°C to ice at 0°C? The ΔH_fusion for water = 6.01 kJ/mol, and the ΔH_vap for Freon-12 = 17.4 kJ/mol.

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