Question #152723

One kilogram of fresh air is compressed isothermally and reversibly from

1.0 bar and 30 oC to 5.0 bar. Calculate the work done w on the air and

the heat flow q to or from the air.

1.0 bar and 30 oC to 5.0 bar. Calculate the work done w on the air and

the heat flow q to or from the air.

Expert's answer

"W=\\frac{m}{M}RT\\ln{\\frac{p_1}{p_2}}=\\frac{1}{0.029}\\cdot 8.31\\cdot 303\\cdot\\ln{\\frac{100000}{500000}}=-140(kJ)"

"Q=\\Delta U+W=0+W=-140(kJ)"

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