This portion of the boundary is at temperature Tres 600 K Reservoir at Tres W - Air initially at 300 K, 1 bar. Finally, T2 600 K

Steam, initially at 5 MPa, 280°C undergoes a polytropic process in a piston–cylinder assembly to a final pressure of 20 MPa. If the polytropic constant, n = 1.4, calculate the non-flow work in kJ/kg.

Carbon dioxide (molar mass 44 kg/kmol) expands reversibly in a perfectly thermally insulated cylinder from 3.7 bar, 220 0C to a volume of 0.085 m3. If the initial volume occupied was 0.02 m3, calculate the adiabatic index to 1 decimal place. Assume nitrogen to be a perfect gas and take cv = 0.63 k J / k g K

Calculate the energy requirement to raise the temperature of 1 kg of water from 60 ° C of water to 90 ° C using the following approach;   a. Average specific heat usage (Tab A Singh's Book. 4.1) = kJ b. The enthalpy change in the water - vapor saturation table (Tab A Singh's Book. 4.2) = kJ

Refrigerant 134a at p1 = 30 lb/in?, T1 = 40°F enters a compressor operating at steady state with a mass flow rate of 400 lb/h and exits as saturated vapor at p2 = 160 lb;/in?. Heat transfer occurs from the compressor to its surroundings, which are at To = 40°F. Changes in kinetic and potential energy can be ignored. The power input to the compressor is 4 hp. Determine the heat transfer rate for the compressor, in Btu/hr, and the entropy production rate for the compressor, in Btu/hr-°R.

Refrigerant 134a at p1 = 30 lbş/in?, T1 = 40°F enters a compressor operating at steady state with a mass flow rate of 250 lb/h and exits as saturated vapor at p2 = 160 lbę/in?. Heat transfer occurs from the compressor to its surroundings, which are at To = 40°F. Changes in kinetic and potential energy can be ignored. The power input to the compressor is 2.5 hp. Determine the heat transfer rate for the compressor, in Btu/hr, and the entropy production rate for the compressor, in Btu/hr-°R.

A piston–cylinder assembly contains 0.7 lb of air initially at a pressure of 30 lbf/in2 and a temperature of 400oF. The air is heated at constant pressure until its volume is doubled. Assume the ideal gas model with constant specific heat ratio, k = 1.4. Determine the work and heat transfer, in Btu.

During a steady flow process, 4 kg of steam at 15 bar and |260 °C loses 3771 kJ of heat at constant pressure. Determine the final condition of steam.

For each case, determine the specified property value and locate the state sketches of the p–υ and T–υ diagrams. For Refrigerant 134a at T = 160°F, h = 127.7 Btu/lb. Find υ, in ft3/lb. For Refrigerant 134a at T = 90°F, u = 72.71 Btu/lb. Find h, in Btu/lb. For ammonia at T = 160°F, p = 60 lbf/in.2 Find u, in Btu/lb. For ammonia at T = 0°F, p = 35 lbf/in.2 Find u, in Btu/lb. For Refrigerant 22 at p = 350 lbf/in.2, T = 350°F. Find u, in Btu/lb.

As shown in the figure below, a gas contained within a piston–cylinder assembly, initially at a volume of 0.1 m3, undergoes a constant-pressure expansion at p = 3 bar to a final volume of V2 = 0.16 m3, while being slowly heated through the base. The change in internal energy of the gas is 0.25 kJ. The piston and cylinder walls are fabricated from heat-resistant material, and the piston moves smoothly in the cylinder. The local atmospheric pressure is 1 bar. (a) For the gas as the system, evaluate work and heat transfer, each in kJ.(b) For the piston as the system, evaluate work and change in potential energy, each in kJ.