# Thermodynamic Process

See attached diagram.

1. The figure shows a thermodynamic process followed by 150mg of helium.

a) Determine the pressure (in atm) of the gas at points 1, 2, and 3.

p1,p2,p3=________atm

b) Determine the temperature (in celsius) of the gas at points 1, 2, and 3.

T1,T2,T3=________ celsius

c) Determine the volume (in centimeters cubed) of the gas at points 1, 2, and 3.

V1,V2,V3=_________ centimeters cubed

d) How much work is done on the gas during each of the three segments?

W1->2,W2->3,W3->1=_____________ J

e) How much heat energy is transferred to or from the gas during each of the three segments?

Q1->2,Q2->3,Q3->1=______________J

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#### Solution Preview

Please refer to attachment for diagram and proper formatting.

Solution:

At point 1 from the PV graph: Volume = V1 = 1000 cc = 1000 x 10-6 m3 = 10-3 m3, Temperature T1 = 273 + 133 = 406 K, Pressure = P1

At point 2: Volume = V2 = 1000 cc, Pressure P2 = 5P1, Temperature = T2

At point 3: Volume = V3, Pressure P3 = P1, Temperature T3 = T2 (as the two points lie on an isothermal)

As points 2 and 3 lie on an isothermal curve, applying the perfect gas equation:

P2V2 = P3V3

Substituting values: 5P1 x 1000 = P1 V3

V3 = 5000 cc or 5 x ...

#### Solution Summary

This solution contains a detailed step-by-step explanation of how to tackle various thermodynamic problems.