4. The PV diagram below depicts two equilibrium states (A and B) of two molesof helium gas confined within a piston, which both lie on the same adiabat (a curve whichrepresents a collection of equilibrium states that a system can reach without exchangingheat with its surroundings). You are supplied with a meter stick and a thermometer, so youcan determine the volume of the piston and the temperature of the gas at any stage. Youperform an experiment that takes the system from state B to state A along that adiabat.PP.PaQ=0B(a) Your lab assistant records data on the experiment, but loses track of which statethe recorded quantities belong to, and calls them simply states #1 and #2. Use your labassistant's data below (such as it is) to determine the change of the internal energy of thegas during the process.state #1: temperature = 288 K,state #2: pressure = 2.5 x 104 Pa, volume 0.220 m³(b) Find the work done on or by (specify which) the system during the process. Showyour work and/or explain your reasoning.(c) Suppose the piston was filled with two moles of N₂ instead of helium, and that thestates A and B are the same as before (characterized by the same values of P and V).Explain why the curve joining these states that was an adiabat for helium is not an adiabatfor N₂.

Answered: Image /qna-images/answer/85903b89-cb78-471a-80af-df676a89ad31.jpg

4. The PV diagram below depicts two equilibrium states (A and B) of two moles of helium gas confined within a piston, which both lie on the same adiabat (a curve which represents a collection of equilibrium states that a system can reach without exchanging heat with its surroundings). You are supplied with a meter stick and a thermometer, so you can determine the volume of the piston and the temperature of the gas at any stage. You perform an experiment that takes the system from state B to state A along that adiabat.

4. The PV diagram below depicts two equilibrium states (A and B) of two moles of helium gas confined within a piston, which both lie on the same adiabat (a curve which represents a collection of equilibrium states that a system can reach without exchanging heat with its surroundings). You are supplied with a meter stick and a thermometer, so you can determine the volume of the piston and the temperature of the gas at any stage. You perform an experiment that takes the system from state B to state A along that adiabat.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.

Question

4. The PV diagram below depicts two equilibrium states (A and B) of two moles
of helium gas confined within a piston, which both lie on the same adiabat (a curve which
represents a collection of equilibrium states that a system can reach without exchanging
heat with its surroundings). You are supplied with a meter stick and a thermometer, so you
can determine the volume of the piston and the temperature of the gas at any stage. You
perform an experiment that takes the system from state B to state A along that adiabat.
P
P.
Pa
Q=0
B
(a) Your lab assistant records data on the experiment, but loses track of which state
the recorded quantities belong to, and calls them simply states #1 and #2. Use your lab
assistant's data below (such as it is) to determine the change of the internal energy of the
gas during the process.
state #1: temperature = 288 K,
state #2: pressure = 2.5 x 104 Pa, volume 0.220 m³
(b) Find the work done on or by (specify which) the system during the process. Show
your work and/or explain your reasoning.
(c) Suppose the piston was filled with two moles of N₂ instead of helium, and that the
states A and B are the same as before (characterized by the same values of P and V).
Explain why the curve joining these states that was an adiabat for helium is not an adiabat
for N₂.

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