A pure gas made up only of atoms. The noble gases argon, krypton, and xenon are some examples.
Concepts:
Perfect gas law: Work performed on the system: PV = nRT W = -∫PdV
Energy preservation formula: U = Q + W
Reasoning:
W = nRT ln(Vi/Vf) when the process is isothermal.
The temperature is said to be constant, and we are given n, Pfinal, and Vfinal.
Calculation information:
(A) A process that is isothermal has a constant temperature.
PV = nRT, and hence, constant
nRT = PV = 101000 Pa*25*10-3 m3
For a process that is isothermal, W = nRT ln(Vi/Vf).
W/(nRT)=3000 J/(101000 Pa*25*10-3 m3)=-1.19
(The gas produces -W of labor.)
Vi = (25*10-3 m3)/3.28 = 7.62*10-3 m3 = 7.62 L where Vf/Vi = exp(1.19) = 3.28 Vi (b) for a perfect gas PV = nRT. 101000 Pa*25*10-3 m3 = (8.31 J/K) T. T = 303.85 K.
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