An ideal gas undergoes isobaric (constant pressure) expansion at 0.672 bar from a volume of 12.5 L to 19.3 L. This same sample is then allowed to contract isothermally, achieving a final pressure of 1.183 bar. Assume that there are 0.454 moles of gas in the sample and sketch these two steps on a PV-diagram for reference (Note: 1 bar = 105 Pa.) (a) What is the sample's temperature at the end of the expansion in the initial step? (b) Determine the work performed on or by the gas (in ♬) in the first step (isobaric expansion)? Remember that work performed by the gas is negative (< 0). (c) What quantity of work (in J) is performed on or by the gas in the second step of this process (isothermal compression)?

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An ideal gas undergoes isobaric (constant pressure) expansion at 0.672 bar from a volume of
12.5 L to 19.3 L. This same sample is then allowed to contract isothermally, achieving a final
pressure of 1.183 bar. Assume that there are 0.454 moles of gas in the sample and sketch
these two steps on a PV-diagram for reference (Note: 1 bar = 105 Pa.)
(a) What is the sample's temperature at the end of the expansion in the initial step?
(b) Determine the work performed on or by the gas (in J) in the first step (isobaric
expansion)? Remember that work performed by the gas is negative (< 0).
(c) What quantity of work (in J) is performed on or by the gas in the second step of this
process (isothermal compression)?
Transcribed Image Text:An ideal gas undergoes isobaric (constant pressure) expansion at 0.672 bar from a volume of 12.5 L to 19.3 L. This same sample is then allowed to contract isothermally, achieving a final pressure of 1.183 bar. Assume that there are 0.454 moles of gas in the sample and sketch these two steps on a PV-diagram for reference (Note: 1 bar = 105 Pa.) (a) What is the sample's temperature at the end of the expansion in the initial step? (b) Determine the work performed on or by the gas (in J) in the first step (isobaric expansion)? Remember that work performed by the gas is negative (< 0). (c) What quantity of work (in J) is performed on or by the gas in the second step of this process (isothermal compression)?
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