A heat engine does work by using a gas at an initial pressure of 1000 Pa and vol

Question

A heat engine does work by using a gas at an initial pressure of 1000 Pa and volume .1m 3. Step-by-step, it then increases the pressure to 10,000 Pa (at constant volume), increases the volume to .15m3 (at constant pressure), decreases the pressure back to 1,000 Pa (at constant volume) and returns the volume back to .1m3 (at constant pressure). 12) How much heat is added to the gas in the second step? Q = 0 J Q = 450 J Q = 500 J Q = 750 J Q = 1250 J Q = 1350 J 13) How much heat is added to the gas in one complete cycle? Q = 0 J Q = 450 J Q = 500 J Q = 750 J Q = 1250 J Q = 1350 J

Explanation / Answer

Hi,

Please find the below solution,

change in the energy = change in the pressure x volume + change in volumex pressure

12)

(10000-1000) *0.125= 1250 J

13)

10000*(.15-.1) = 10000*0.05=450 J

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