 #1
 911
 18
Hi
Here is a small problem. I already got the answer for part a. I have question about the part b.
For finding the heat energy input/output in each process from A to A, can't we use the
formula for the specific heat of the gas.
[tex] Q=m\, c \, (\Delta T) [/tex]
But if we use that , I get [itex] Q_{net} =0 [/itex] for the whole cycle.
That could not be correct, since I am getting net work done as
[tex]W_{net}=4P_i V_i [/tex]
Since in a thermodynamic cycle, we must have
[tex] \Delta E_{int} = 0[/tex]
we deduce that
[tex]Q_{net}=W_{net} = 4 P_i V_i [/tex]
So what's wrong with my beginning approach to Q_{net} ?
Here is a small problem. I already got the answer for part a. I have question about the part b.
For finding the heat energy input/output in each process from A to A, can't we use the
formula for the specific heat of the gas.
[tex] Q=m\, c \, (\Delta T) [/tex]
But if we use that , I get [itex] Q_{net} =0 [/itex] for the whole cycle.
That could not be correct, since I am getting net work done as
[tex]W_{net}=4P_i V_i [/tex]
Since in a thermodynamic cycle, we must have
[tex] \Delta E_{int} = 0[/tex]
we deduce that
[tex]Q_{net}=W_{net} = 4 P_i V_i [/tex]
So what's wrong with my beginning approach to Q_{net} ?
Attachments

41.1 KB Views: 344