At steady state, a thermodynamic cycle operating between hot and cold reservoirs at 1000 K and 500 K, respectively, receives energy by heat transfer from the hot reservoir at a rate of 1500 kW, discharges energy by heat transfer to the cold reservoir, and develops power at a rate of (a) 1000 kW, (b) 750 kW, (c) 0 kW. For each case, apply Eq. 5.13 on a time- rate basis to determine whether the cycle operates reversibly, operates irreversibly, or is impossible.

At steady state, a thermodynamic cycle operating between hot and cold reservoirs at 1000 K and 500 K, respectively, receives energy by heat transfer from the hot reservoir at a rate of 1500 kW, discharges energy by heat transfer to the cold reservoir, and develops power at a rate of (a) 1000 kW, (b) 750 kW, (c) 0 kW. For each case, apply Eq. 5.13 on a time- rate basis to determine whether the cycle operates reversibly, operates irreversibly, or is impossible.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Write to text format answer
In an experiment, the students used an unknown substance with a molecular weight of 28. They utilized 1kg of the unknown substance with a specific heat of 1.04kJ/kgK at constant pressure. The students also assumed that the substance operates in the same way as an Ideal Gas does. Show unit analysis and conversion. Find: a. the interval in the entropy of the substance from 47degree Celsius and 2atm to 327degree Celsius and 5atm. b. the substance's interval in internal energy.
A 4.00 L sample of a diatomic ideal gas with specific heat ratio 1.40, confined to a cylinder, is carried through a closed cycle. The gas is initially at 68 atm and at 300 K. First, its pressure is tripled under constant volume. Then, it expands adiabatically to its original pressure. Finally, the gas is compressed isobarically to its original volume (see the figure). What was the net work done (in kJ) on the gas for this cycle? (Hint: clockwise cycle causes negative work done) (Answer no decimal) 3 P; Adiabatic V(L) V= 4 L Vc
This is a thermodynamics question! Please consider all equations for thermo. Please show all steps and ensure the answer is in the correct units! NO TUTOR HAS GOTTEN THIS RIGHT YET :(
A plastic bag containing 0.2 kg of water at 20°C is dropped from a height of 0.5 m onto an insulating carpet. Assume that the bag does NOT break. What is the approximate probability that a similar bag sitting on a carpet will do the reverse; that is, spontaneously jump 0.5 m in the air? Express your answer in the form "Probability = 10-x," where x is a number you will calculate. (Hint: Note that ey = 10y÷ln(10).)
Needs Complete typed solution with 100 % accuracy.
A refrigerator operates according to a Brayton cycle, schematized below. The gas conditions (gamma = 1.4) at point 1 are P₁, V₁ and T₁ = 100 K. It is known that V₁ = 10 V₂ = 5 V₃ = V₄ / 2. Consider that Tf is the cold source temperature and Tq is the hot source temperature. It is known that Tq and Tf are, respectively, the maximum and minimum possible for the chiller to operate under these conditions. A Carnot chiller operating between these same two reservoirs would have a coefficient of performance closer to: a) 0.25b) 0.5c) 1d) 2e) 4f) 8g) 16
An ideal gas initially at P₁, V₁, and T₁ is taken through a cycle as shown below. (Let the factor n = 3.9. Note, this is the factor by which volume and pressure increase, as noted on the PV-diagram; it is NOT the number of moles of gas.) P nP; P₁ B D nv; (a) Find the net work done on the gas per cycle for 1.35 mol of gas initially at 0°C. kJ (b) What is the net energy added by heat to the system per cycle? kJ
Q.17 Consider two identical, finite, isolated systems of constant heat capacity C at temperatures T, and T2 (T> T:). An engine works between them until their temperatures become equal. Taking into account that the work performed by the engine will be maximum (= Wmax) if the process is reversible (equivalently, the entropy change of the entire system is zero), the value of Wmax is: (A) C(T, – T2) (B) C (T, – T2)/2 (C) C(T, + T2 -- T;T2) (D) C(/T, - T)
3.2 Show that the entropy maximum principle encountered in the study of isolated systems [eq. (2.50)] is equivalent to the statement that the non- flow exergy of an isolated system is destined to decrease or, at best, remain unchanged. 33 Conuid
5 A kmol of oxigen (Cv=5 and Cp= 7 kcal/Kmol-K) get heated from a temperature of 20ºC and 1atmosphere pressure, to 100 °C: a) b) If volumen remain constant. How much heat must be added to fulfill this process? If pressure remains constant. How much work has been done? c) In both cases, compute which is the variation of internal energy. Consider oxigen as an ideal gas (R=8.31-10³ J/(kmol-K))
Please solve and explian the solution: Let M represent a certain mass of coal which we assume will deliver 100 joules of heat when burned – whether in a house, delivered to the radiators or in a power plant, delivered at 1000°C. Assume the plant is ideal (no waste in turbines or generators) discharging its heat at 30°C to a river. How much heat will M, burned at the plant to generate electricity, provide for the house when the electricity is:(a) delivered to residential resistance-heating radiators?(b) delivered to a residential heat pump (again assumed ideal) boosting heat from a reservoir at 0°C into a hot-air system at 30°C?