Q2: One mole of an ideal gas, initially at 40 C and 1 bar, is changed to 140°C and 12 bar by three different mechanically reversible processes: a- The gas is first heated at constant volume until its temperature is 140°C; then it is compressed isothermally until its pressure is 12 bar. b- The gas is first heated at constant pressure until its temperature is 140°C; then it is compressed isothermally to 12 bar. c- The gas is first compressed isothermally to 12 bar; then it is heated at constant pressure to 140°C. Calculate Q. W, AU, and AH in cach case. Take CP = (7/2)R and CV = (5/2)R. Alternatively, take CP = (5/2)R and CV = (3/2)R.

Q2: One mole of an ideal gas, initially at 40 C and 1 bar, is changed to 140°C and 12 bar by three different mechanically reversible processes: a- The gas is first heated at constant volume until its temperature is 140°C; then it is compressed isothermally until its pressure is 12 bar. b- The gas is first heated at constant pressure until its temperature is 140°C; then it is compressed isothermally to 12 bar. c- The gas is first compressed isothermally to 12 bar; then it is heated at constant pressure to 140°C. Calculate Q. W, AU, and AH in cach case. Take CP = (7/2)R and CV = (5/2)R. Alternatively, take CP = (5/2)R and CV = (3/2)R.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

Q2: One mole of an ideal gas, initially at 40°C and 1 bar, is changed to 140°C and
12 bar by three different mechanically reversible processes:
a- The gas is first heated at constant volume until its temperature is 140°C; then it
isc
compressed isothermally until its pressure is 12 bar.
b- The gas is first heated at constant pressure until its temperature is 140°C; then it
is compressed isothermally to 12 bar.
c- The gas is first compressed isothermally to 12 bar; then it is heated at constant
pressure to 140°C. Calculate Q. W, AU, and AH in each case. Take CP = (7/2)R
and CV = (5/2)R. Alternatively, take CP = (5/2)R and CV = (3/2)R.

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