Answer the following questions:Show all your work. Include formulae and units! E

Question

Answer the following questions:Show all your work. Include formulae and units! EVERY TIME! Be sure to include meaningful,relavant diagram Don't try to squeeze everythingWrite down any formula used before plugging any numbers into it.

4. A 4-cycle heat engine operates as follows:

I) An isobaric expansion at 7 atmospheres of pressure from an initial volume of 0.01m3 to 0.03m3.

II) A reduction of pressure to 2 atmospheres at constant volume.

III) An isobaric compression back to 0.01m3.

IV) An increase in pressure to 7 atmospheres at constant volume.

From this information determine:

a. Sketch this cycle on a PV diagram.Be sure to label the axes and use arrows to show the directions of the processes outlined above.

b. Compute the amount of work done by the engine during each complete cycle.

c. If the engine is supplied with 20,000J of energy during each cycle, what is the efficiency

d. How much waste heat is exhausted during each cycle?

Explanation / Answer

III) An isobaric compression back to 0.01m3.

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