You are conducting experiments to study prototype heat engines. In one test, 4.00 mol of argon gas are taken around the cycle shown in. The pressure is low enough for the gas to be treated as ideal. You measure the gas temperature in states a, b, c, and d and find Ta = 250.0˚K, Tb = 300.0˚K, Tc = 380.0˚K, andTd = 316.7˚K. A to B -- constant volume B to C -- constant pressure C to D -- constant volume  D to A -- constant pressure    Calculate the efficiency e of the cycle.  e = ______ %

n moles of a diatomic ideal gas go through cycle a → b → c → d → a as shown in the figure. Processes ab and cd are isothermal and occur at temperatures TH and TC, respectively.   1) Calculate the work Wab done by the gas during the process a → b in terms of the variables in the problem.  2) Calculate the work Wbc done by the gas during the process b → c.  3) Calculate the total work W done in the entire cycle in terms of the variables in the problem.  4) Calculate the total heat Q flowing into the gas in a complete cycle.

Problem 15. Four moles of a monatomic ideal gas (C, = 3R/2, Cp =5R/2) are heated at constant pressure from T = 10.0 °C to T = 60.0 °C. How much work is done by gas? %3D

A gas expands from 2.2 L to 3.6 L against a constant external pressure of 1.6 atm. What is the work done?   A. -227 J  B.  227 J  C. 2.24 J  D. -2.24 J

D,e,f