Molecular Physics | Thermodynamics Answers

One pound of saturated steam at 100 psia is expanded in a reversible non-flow process from a specific volume of 0.017736 #3/16 to a specific volume of 4.434 ftp/lb. If the pressure remains constant and the internal energy increases 807.5 Btu /lb during the process, determine how much heat is transferred, Btu /lb, and whether it will be added to our abstracted from the working substance.

If the above problems is carried out as indicated, but with the additional provision that the process is also performed at a constant temperature of 327.9 F, calculate the change of entropy for the steam during the process, Btu/b.°R.

A turbine operating under steady-flow conditions receives steam at the following state: pressure, 13.8 bar; specific volume 0.143 m^3/kg specific internal energy 2590 kj/kg, velocity 30 m/s. The state of the steam leaving the turbine is as follows: pressure 0.35 bar, specific volume 4.37 m^3/kg, specific internal energy 2360 kj/kg, velocity 90 m/s. Heat is rejected to the surroundings at the rate of 0.25 kW and the rate of steam flow through the turbine is 0.38 kg/s. Calculate the power developed by the turbine.

A steady flow of steam enters a condenser with a specific enthalpy of 2300 kj/kg and a velocity of 350m/s. The condensate leaves the condenser with a specific enthalpy of 160 kj/kg and a velocity of 70 m/s. Calculate the heat transfer to the cooling fluid per kilogram of steam condensed.

a reversible non-flow process with a gas is defined by the equation pv=c. show that the work done is given by the equation wk12=p1v1ln(V2/V1)

half a pound of gas undergoes a reversible non flow process at with the pressure remaining constant at 50 psia while the volume increases from 4ft^3 to 8ft^3. find the work done, BTU/lb

At standard atmospheric pressure, saturated steam has a specific volume of 26.80 ft3 /lb. If the enthalpy of that same vapor is 1150.5 Btu/lb, calculate the internal energy of the steam in Btu/lb.

two kilograms of gas undergo a reversible non-flow process at 350 kPa while the volume increases from 0.4734 m^3. find the work done, kj/kg

During a non-flow process 120 Btu are removed as heat from each pound of working substance while the internal energy decreases 85.5 Btu /lb. Calculate the work involved in the process in ft·lbf/lb

during a reversible process with a certain working substance, the entropy remains constant while the temperature increases from 250°F to 450°F. Find the heat transferred