On the attached file, I need parts c and d from #9. You'll see that I already did parts a and b.© BrainMass Inc. brainmass.com November 30, 2021, 5:23 am ad1c9bdddf
A reversible engine takes in 2000 joules from a reservoir at 400 K; it then gives up Q'1 joules to a reservoir at 300 K and Q1 joules to a reservoir at 200 K, doing 750 joules of work per cycle.
(a) Compute the efficiency and compare with that of a Carnot engine working between 400 K and 200 K.
(b) Find Q'1 and Q1.
(c) Draw the cycle on a p-V diagram.
(d) Find the entropy change per cycle of each reservoir and that of the universe.
(a) The thermal efficiency of the cycle is defined by the formula:
Replacing with numerical values, we will get:
The expert examines P-V diagrams for entropy change.