For an ideal gas with constant properties undergoing a quasi-static process, which one of the following represents the change of entropy ( s) from state 1 to 2?

ds = c p ln T 2 - R ln P 2 T 2 P 2

For an ideal gas with constant properties undergoing a quasi-static pr

1.	For an ideal gas with constant properties undergoing a quasi-static process, which one of the following represents the change of entropy ( s) from state 1 to 2?
A.	<table><tr><td rowspan="2">ds = c<sub>p</sub>ln</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>T<sub>2</sub></center></td><td rowspan="2">- R ln<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>P<sub>2</sub></center></td><td rowspan="2"></td></tr><td align="center">T<sub>1</sub></td><td align="center">P<sub>1</sub></td></table>
B.	<table><tr><td rowspan="2">ds = c<sub>p</sub>ln</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>T<sub>2</sub></center></td><td rowspan="2">- R ln<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>P<sub>2</sub></center></td><td rowspan="2"></td></tr><td align="center">T<sub>2</sub></td><td align="center">P<sub>2</sub></td></table>
C.	<table><tr><td rowspan="2">ds = c<sub>p</sub>ln</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>T<sub>1</sub></center></td><td rowspan="2">- R ln<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>P<sub>2</sub></center></td><td rowspan="2"></td></tr><td align="center">T<sub>2</sub></td><td align="center">P<sub>1</sub></td></table>
D.	<table><tr><td rowspan="2">ds = c<sub>p</sub>ln</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>T<sub>2</sub></center></td><td rowspan="2">+ R ln<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>P<sub>2</sub></center></td><td rowspan="2"></td></tr><td align="center">T<sub>1</sub></td><td align="center">P<sub>1</sub></td></table>
Answer» B. <table><tr><td rowspan="2">ds = c<sub>p</sub>ln</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>T<sub>2</sub></center></td><td rowspan="2">- R ln<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>P<sub>2</sub></center></td><td rowspan="2"></td></tr><td align="center">T<sub>2</sub></td><td align="center">P<sub>2</sub></td></table>

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For an ideal gas with constant properties undergoing a quasi-static process, which one of the following represents the change of entropy ( s) from state 1 to 2?

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