The PV diagram below shows four different states, A, B, C, and D. The lines conn
ID: 1787271 • Letter: T
Question
The PV diagram below shows four different states, A, B, C, and D. The lines connecting the states represent processes or transitions. For example, the line connecting states A and B represents an expansion of the gas (transition to larger volume) while the pressure is kept constant. In the case of this diagram, the pressure at states A and B is 3.80×105 Pa. The pressure at states C and D is 1.56×105 Pa. Likewise the volume at states A and D is 1.14×10-3 m3 and the volume at states B and C is 3.53×10-3 m3.
What type of process is the transition from state B to C (transition BC)?
Incorrect isothermal
Correct: isochoric
Incorrect adiabatic
Incorrect isobaric
What type of process is the transition from state C to D (transition CD)?
Incorrect isothermal
Correct: isobaric
Incorrect adiabatic
Incorrect isochoric
What is the work done by the gas for the transition BC?
What is the work done by the gas for the transition AB?
What is the work done by the gas for the transition CD?
What is the change in internal energy, U, if you follow the system all the way from A to B to C to D and back to A?
You are correct.Your receipt no. is 160-3015 Previous Tries
Explanation / Answer
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Work Done During BC:
Wbc is 0 there is no change in the Volume of the gas
fromW = pdV , dV is V-V = 0
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Work Done During AB :
WAB = P1 *(VB-VA)
WAB = 3.8*10^5 *(3.53 *10^-3 - 1.14*10^-3)
WAB = 908.2 Joules
======================================
Work DOne During CD:
Wcd = Pd * (Vd-Vc)
Wcd = 1.56 *10^5 *(1.14*10^-3 - 3.53 *10^-3)
Wcd = -372.84 Joules
====================================
If the system experiences a cyclical transformation,
we have the change in internal energy (U =0) is zero and
the state A and returns to the same state
i,e ( U = 0)
========================================
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