A sample of a triatomic perfect gas is found to have a molar heat capacity that changes with temperature given by Cv,m/ JK-1 = 11.91 + 8.79 x 10(-3)T - 8.62 x 10(+5)/T(+2). Calculate q, w, ΔU and ΔH for 2.5 moles of gas when the temperature is increased from 25C to 250C at constant pressure.

The following equation of state is found to describes the behavior of a particular gas with reasonable accuracy. Z = 1 + (a - b/T)P/RT where a=15x10-6 m3/mol and b= 0.06 (m3.K)/mol. Show that the residual enthalpy and residual entropy take the form: (H^r)/RT =(A-2B) and (S^r)/R = -B where A =(aP)/RT and B = (bP)/(RT^2)

A closed steam room of volume 125 m has a temperature 45 C and has a RH=100%. Calculate: a. The mass of water vapor in the room; b. The person inside decides that it is too hot and lowers the thermostat's temperature to a new temperature of 35 C. What is the mass of water vapor for this temperature? c. How much water vapor will condense, in order to still have RH=100% in the room?

A Stirling cycle is a thermodynamic cycle similar to the Carnot cycle and is defined by the following processes. -> 2: Isothermal expansion -> 3: isochoric cooling -> 4: isothermal heating -> 1: isochoric heating Solve the graph for  a Stirling cycle with the given information in which 50g of Ar (treated as an ideal gas) is isothermally expanded from 4L to 16L at a temperature of 700K. The sample is then undergoes isochoric cooling to 298K.  The sample is then isothermally compressed to 3L and finally undergoes isochoric heating back to 700K.