2. Consider an engine operating with a monatomic ideal gas of 0.5 moles on a 3 s

Question

2. Consider an engine operating with a monatomic ideal gas of 0.5 moles on a 3 stroke cycle with a PV diagram shown below. in the stroke A to B the internal energy increases by 2887Joules. What is the work performed by this engine? What is the real efficiency of this engine? What is the maximum efficiency (cannot cycle) one could expect for an engine working between these temps?

/ /| B

| / |

| / | triangle

1 atm | / |

| A / |

| ----------- C

|

-----|-----------|-------->

20L 30L

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Explanation / Answer

ok so Efficiency = (output / input) * 100 1200/1700 x 100 =71% efficient. work is equal to the change in energy w= 1700J-1200J w= 500J

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