ANSWER = - 200kj/kg
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The heat transfer to the system, in kJ/kg, for the reversible process 1-2-3 shown in the...
the heat transfer The heat transfer to the system, in kJ/kg. for the reversible process 1-2-3 shown in the figure is closer TIKI 400 100 5 s (kl/kg.K) -400 200 o -300 100 00 300 0-200 400 Question 18
Question 17 The heat transfer to the system, InkJ/kg. for the reversible process 1-2-3 shown in the gure is closer тік) 3 2 400 100 1 2 5 ski/kg)
straight line system is 7 kg. Compute the beat transfer for the process. -s coordinates below shows a reversible process. The mass in the T(K) (5 points) 750 300 1.77 3.15 S(kJ/K) kJ ANSWER Nitrogen undergoes a constant pressure process in a closed system from 140 psi, 300 F to 120 F For nitrogen op 0.249 and cy 0.178 Btu/lbm R (a) Compute the change in specific enthalpy. (5 points) Btu/lbm ANSWER (b) Find the heat transfer if the system...
A gas in a cylinder piston system occupies V, - 15 mºat P. = 220 kPa and T, -20°C. Then, the gas undergoes a polytropic compression process until its temperature becomes T, 300'C. The entropy change of the gas during this process is AS - -1.7626 kJ/K, (AS-S.-5.). By assuming ideal gas (R = 0.3 kJ/kg.K. cp = 0.8 kJ/kg.K. cv = 0.5 kJ/kg.K), determine: 3pt) the mass of the gas, m (kg) = (9pt) the work transfer, W (kl)...
Calculate the total work, in kJ, for process 1–3 shown in the figure when the system consists of 1.5 kg of nitrogen. 5000 400 P, kPa 100 0.5 0, m?/kg The total work for process 1–3 is D k J.
Problem 4 – Entropy transfer in a control volume (18 pts) An adiabatic reversible steam turbine steadily processes 2 kg/s of steam at 5 MPa and 450°C, which is exhausted at 100 kPa and 100°C. The turbine exhibits an isentropic efficiency of 0.85. a) Draw a schematic representation of the system with all the energy interactions involved. (2pts) b) Determine the h (kJ/kg) and s (kJ/kg-K) at the inlet. (2 pts) c) Determine the actual h (kJ/kg) and s (kJ/kg-K)...
As shown in the figure, a reversible power cycle receives energy QH by heat transfer from a hot reservoir at TH and rejects energy QC by heat transfer to a cold reservoir at TC. a) If TH = 1600 K, TC = 400 K, what is the thermal efficiency? b) If TH = 500oC, TC = 20oC, and Wcycle = 1000 kJ, what are QH and QC, each in kJ? c) If ? = 60% and TC = 40oF, what...
Air as an idcal gas in a closed system undergoes a reversible process between temperatures of 1000 K and 400 K. The beginning pressure is 200 bar Determine the highest possible ending pressure for this process. If the ending pressurc is 3 bar, determine the heat transfer and work per unit mass, if the boundary of the system is in constant contact with a reservoir at 400 K.
Example 7.17 Calculate the minimum work required to chill 2 kg of drinking water from a temperature of 25°C to 2°C. The Cp of water as 4.184 kJ/kg.K. Problem 2: ( 2 Points) Example 7.18 A novel reversible heat engine plot on a T-s diagram is as circle. The maximum and minimum temperatures are 1100 K and 200 K, respectively and the maximum entropy change in the cycle is 2 kJ/K. Calculate the heat added to the cycle, heat rejected,...
A metal part is undergoing a heat-treating process, it has a mass of 12 kg and is initially at 950∘C. The part is quenched in a tank containing 225 kg of water, initially at 35∘C. Consider the heat transfer between the tank and its surroundings to be negligible. Taking the specific heat of the metal part and water as constant at 0.5 kJ/kg.K and 4.2 kJ/kg.K respectively, determine : The final equilibrium temperature after quenching Tf= ∘C The amount of...