Using the data presented in the pressure-versus-volume drawing below (x = 1.10E+
ID: 1289342 • Letter: U
Question
Using the data presented in the pressure-versus-volume drawing below (x = 1.10E+4 Pa and y = 2.20E-3 m3), calculate the magnitude of the work done when the system changes from A to B to C along the path shown.
Please show all work and explain your methods.
Using the data presented in the pressure-versus-volume drawing below (x = 1.10E+4 Pa and y = 2.20E-3 m3), calculate the magnitude of the work done when the system changes from A to B to C along the path shown. Please show all work and explain your methods.Explanation / Answer
Work done by a gas is given by W=P?V
I had a question with the same formula last week, so I'll just paste the derivation from there:
-------------------------BORING DERIVATION. SKIP IF UNINTERESTED----------------------------...
This formula W=P?V comes from considering a gas cylinder with ends of area A (see img29.imageshack
.us/img29/756/pistoni
.jpg ).
This gas expands and does work, pushing against the piston lid to move it up. If the piston moves a distance d, then
Work
= Force x Distance
= (Pressure x Area) x Distance [since P = F/A]
= Pressure x Volume [since V = Area x height]
= P?V
-------------------------END BORING DERIVATION-----------------------------
BTW The notation you used is horrible ==; I spent 10 minutes researching what it meant lol. (in case this question was given to you like that and you dont know what it means either, 1.15E+4 = 1.15 x 10^4 and 1.85E-3 = 1.85 x 10^-3. evil notation =[ )
So we now know 1 grid of pressure = 1.10 x 10^4 Pa
***let us call 1 grid P***
also we know 1 grid of volume = 2.20 x 10^-3 m
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