The following problems involve one mole of an ideal monatomic gas, CP = 5R/2, in a variable volume piston/cylinder with a stirring paddle, an electric heater, and a cooling coil through which refrigerant can flow (see figure in images). The piston is perfectly insulated. The piston contains 1 g-mole of gas. Unless specified, the initial conditions are: T i = 25oC, P i = 5 bar. (a) Status: Heater on; cooler off; paddle off; piston fixed. Five kJ are added by the heater. Find ΔU, ΔS, ΔP, and ΔT. (b) Status: Heater off: cooler off; paddle off; piston moveable. What reversible volume change will give the same temperature rise as in part (a)? Also find ΔU, ΔS, and ΔP. (c) Status: Heater off; cooler off; paddle on; piston fixed. What shaft work will give the same ΔU and ΔS as in part (a)?
The following problems involve one mole of an ideal monatomic gas, CP = 5R/2, in a variable volume piston/cylinder with a stirring paddle, an electric heater, and a cooling coil through which refrigerant can flow (see figure in images). The piston is perfectly insulated. The piston contains 1 g-mole of gas. Unless specified, the initial conditions are: T i = 25oC, P i = 5 bar. (a) Status: Heater on; cooler off; paddle off; piston fixed. Five kJ are added by the heater. Find ΔU, ΔS, ΔP, and ΔT. (b) Status: Heater off: cooler off; paddle off; piston moveable. What reversible volume change will give the same temperature rise as in part (a)? Also find ΔU, ΔS, and ΔP. (c) Status: Heater off; cooler off; paddle on; piston fixed. What shaft work will give the same ΔU and ΔS as in part (a)?
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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The following problems involve one mole of an ideal monatomic gas, CP = 5R/2, in a variable volume piston/cylinder with a stirring paddle, an electric heater, and a cooling coil through which refrigerant can flow (see figure in images). The piston is perfectly insulated. The piston contains 1 g-mole of gas. Unless specified, the initial conditions are: T i = 25oC, P i = 5 bar.
- (a) Status: Heater on; cooler off; paddle off; piston fixed. Five kJ are added by the heater. Find ΔU, ΔS, ΔP, and ΔT.
- (b) Status: Heater off: cooler off; paddle off; piston moveable. What reversible volume change will give the same temperature rise as in part (a)? Also find ΔU, ΔS, and ΔP.
- (c) Status: Heater off; cooler off; paddle on; piston fixed. What shaft work will give the same ΔU and ΔS as in part (a)?
Transcribed Image Text:M Heater Coil
blod 1
COO
Cooling Coil
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