Btu For a certain ideal gas, R = 77.8 t t and Cp = (0.2 + 0.0002T) lb R It is lb R heated from 40 °F to 140 °F . For 1 lb mass, find: a. change of internal energy ( answer: 21 Btu ) b. change of enthalpy ( answer: 31 Btu )

Btu For a certain ideal gas, R = 77.8 t t and Cp = (0.2 + 0.0002T) lb R It is lb R heated from 40 °F to 140 °F . For 1 lb mass, find: a. change of internal energy ( answer: 21 Btu ) b. change of enthalpy ( answer: 31 Btu )

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter11: Calibrating Instruments

Section: Chapter Questions

Problem 4RQ: Temperature-measuring instruments may be designed to measure the temperature of vapors, ________,...

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Question

For a certain ideal gas, R = 77.8 t t and Cp = (0.2 + 0.0002T)
Btu
It is
lb R
lb R
heated from 40 °F to 140 °F . For 1 lb mass, find:
a. change of internal energy ( answer: 21 Btu )
b. change of enthalpy ( answer: 31 Btu )

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