Question

Question 1

Nitrogen (molecular weight 28) expands reversibly in a cylinder behind a piston at a constant pressure of 1.05 bar. The temperature is initially at 27 °C. It then rises to 500 °C; the initial volume is 0.04 m3. Assuming nitrogen to be a perfect gas and take Cp = 1.045 kJ/kg K, calculate the:

a) mass of nitrogen

b) work done by nitrogen

c) heat flow to or from the cylinder walls during the expansion

Answer #1

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