Question

A piston contains 580 moles of an ideal monatomic gas that initally has a pressure of 1.06 x 105 Pa and a volume of 1.3 m3. The piston is connected to a hot and cold reservoir and the gas goes through the following quasi-static cycle accepting energy from the hot reservoir and exhausting energy into the cold reservoir. The pressure of the gas is increased to 4.06 x 105 Pa while maintaining a constant volume. The volume of the gas is increased to 8.3 m3 while maintaining a constant pressure. The pressure of the gas is decreased to 1.06 x 105 Pa while maintaining a constant volume. The volume of the gas is decreased to 1.3 m3 while maintaining a constant pressure. It may help you to recall that Cy = 12.47 J/K/mole and Cp = 20.79 J/K/mole for a monatomic ideal gas. How much energy is transferred into the gas from the hot reservoir during the first step? J Submit You currently have 1 submissions for this question. Only 10 submission are allowed. You can make 9 more submissio

Answer 1

11) Work Done = Qin - Qout = 2.11 * 10⁶ J

12) Efficiency = work/ Qin = (2.11*10⁶) / ( 7.71 * 10⁶)

= 0.27 or 27 %