This one seems fairly simple. I\'m not sure why I keep gettingit wrong! :( Use t

Question

This one seems fairly simple. I'm not sure why I keep gettingit wrong! :( Use the worked example above to help yousolve this problem. In a system similar to that shown in thefigure, the gas in the cylinder is at a pressure of1.01 x 105 Pa and the piston has anarea of 0.123 m2.

As energy is slowly added to the gas by heat, the piston is pushedup a distance of 4.49 cm.

Calculate the work done by the expanding gas on the surroundings,Wenv, assuming the pressure remainsconstant.

Your response is within 10% of the correctvalue. This may be due to roundoff error, or you could have amistake in your calculation. Carry out all intermediate results toat least four-digit accuracy to minimize roundoff error.J This one seems fairly simple. I'm not sure why I keep gettingit wrong! :( Use the worked example above to help yousolve this problem. In a system similar to that shown in thefigure, the gas in the cylinder is at a pressure of1.01 x 105 Pa and the piston has anarea of 0.123 m2.

As energy is slowly added to the gas by heat, the piston is pushedup a distance of 4.49 cm.

Calculate the work done by the expanding gas on the surroundings,Wenv, assuming the pressure remainsconstant.

Your response is within 10% of the correctvalue. This may be due to roundoff error, or you could have amistake in your calculation. Carry out all intermediate results toat least four-digit accuracy to minimize roundoff error.J Use the worked example above to help yousolve this problem. In a system similar to that shown in thefigure, the gas in the cylinder is at a pressure of1.01 x 105 Pa and the piston has anarea of 0.123 m2.

As energy is slowly added to the gas by heat, the piston is pushedup a distance of 4.49 cm.

Calculate the work done by the expanding gas on the surroundings,Wenv, assuming the pressure remainsconstant.

Your response is within 10% of the correctvalue. This may be due to roundoff error, or you could have amistake in your calculation. Carry out all intermediate results toat least four-digit accuracy to minimize roundoff error.J

Explanation / Answer

W=P(d2 - d1)A W=1.01x105 (0.0449) 0.123 = 557.79 or W= 558 J
Does that help?

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