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2. A certain amount of air is compressed inside a cylinder. The internal energy change is 16 Btu. Work required for compression process is 300 Btu. What is the amount of heat transfer involved in ft-lbr.

2. A certain amount of air is compressed inside a cylinder. The internal energy change is 16 Btu. Work required for compression process is 300 Btu. What is the amount of heat transfer involved in ft-lbr.

Introduction to Chemical Engineering Thermodynamics
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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2. A certain amount of air is compressed inside a cylinder. The internal energy change is 16 Btu. Work required for compression process is 300 Btu. What is the amount of heat transfer involved in ft-lbr. 3. In the following take Cv = 5 and CP = 7 Btu/lbmole-°F for nitrogen gas. (a) Three Ibmoles of nitrogen gas at 70 °F, contained in a rigid vessel, is heated to 3250 °F. How much heat is required if the vessel has negligible heat capacity? If the vessel weighs 200 lbm and has a heat capacity of 0.12 Btu/lbm-°F, how much heat is required? (b) Four Ibmoles of nitrogen at 400 °F is contained in a piston/cylinder arrangement. How much heat must be extracted from this system, which is kept at constant pressure, to cool it to 150 °F if the heat capacity of the piston and cylinder is neglected?
Transcribed Image Text:2. A certain amount of air is compressed inside a cylinder. The internal energy change is 16 Btu. Work required for compression process is 300 Btu. What is the amount of heat transfer involved in ft-lbr. 3. In the following take Cv = 5 and CP = 7 Btu/lbmole-°F for nitrogen gas. (a) Three Ibmoles of nitrogen gas at 70 °F, contained in a rigid vessel, is heated to 3250 °F. How much heat is required if the vessel has negligible heat capacity? If the vessel weighs 200 lbm and has a heat capacity of 0.12 Btu/lbm-°F, how much heat is required? (b) Four Ibmoles of nitrogen at 400 °F is contained in a piston/cylinder arrangement. How much heat must be extracted from this system, which is kept at constant pressure, to cool it to 150 °F if the heat capacity of the piston and cylinder is neglected?
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