Q2. A 0.8 m³ rigid tank contain carbon dioxide (CO₂) gas at 250K and 100 kPa. A 500W electric resistance heater placed in the tank for 40 minutes until the pressure of CO2 becomes 175 kPa. The total amount of heat transfer to the surrounding is 976 kJ. Assuming the surroundings temperature to be at 300K, calculate a) the mass and final temperature of CO₂ (K) b) the entropy changes of CO₂ (KJ/K) c) the entropy changes of the surrounding

Q2. A 0.8 m³ rigid tank contain carbon dioxide (CO₂) gas at 250K and 100 kPa. A 500W electric resistance heater placed in the tank for 40 minutes until the pressure of CO2 becomes 175 kPa. The total amount of heat transfer to the surrounding is 976 kJ. Assuming the surroundings temperature to be at 300K, calculate a) the mass and final temperature of CO₂ (K) b) the entropy changes of CO₂ (KJ/K) c) the entropy changes of the surrounding

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Refrigerant 134a enters an evaporator as a saturated liquid at 4bars and exits as a superheated vapour at 60degrees Celsius. If 85.9kW of heat is absorbed by the refrigerant, what is the mass flow rate in kg/s?
The subject is thermodynamics 2
Calculate the compressor work in kJ required to compress 1 kg of an ideal gas from an initial volume and pressure of 0.65m3 and 101.3kpa to a final pressure of 517kpa. Compression is with n=1.35. A. 133.6 B. 105.8 C. 148.3 D. 142.7
Q:: one kg of air initially at 8 bar and 380 K expands polytropically according to the law p.v12= constant till the pressure is reduced to one-fifth value. Calculate: 1. Work done 2. Heat interaction 3. Change in entropy
2.) There is 1.5 kgm of a gas where k = 1.3 and R = 0.38 kJ/kgm-K that undergoes an isochoric process from p1 = 0.552 MPa, t1 = 58.50C to p2 = 1.66 MPa. During the process, there %3D added 100 kJ of heat. Compute for the heat transferred, change of internal energy, and change of entropy.
Air as ideal gas in the closed system, find the change of entropy from the initial to the final state, in Btu/lb oR ( degree R ). T1 = 360 oF (degree F), P1 = 14.7 psia T2 = 540 oF (degree F), P2 = 58.8 psia
4*. Steam at 2 MPa and 450° C enters an isentropic nozzle with a velocity of 10 m/s and exits at 1.5 MPa. The mass flow rate is 0.2 kg/s. Calculate: a) The exit temperature. b) The velocity of the steam at the exit of the nozzle. c) The area at the exit of the nozzle.
Water vapor is a stable working device with 30 bar pressure, 320°C temperature and 100 m/s speed. enters the nozzle. The outlet pressure and temperature are 10 bar and 200°C, respectively. Mass flow rate is 2 kg/s. Neglecting heat transfer and potential energy; a) Determine the ascent velocity in m/s. b) Determine the inlet and outlet flow areas in cm2.
Helium expands polytropically through a gas turbine according to the process PV^1.419 = C. If the turbine produces 27.09 MW,. determine the heat transferred in kJ/s.
2. A steady stream of steam passes through a turbine. The steam inlet conditions are 10MPa, 450°C and 80m/s and at the outlet they are 10kPa, 92% quality and 50m/s. The mass flow of the steam is 12 kg/s. Determine a) the change in kinetic energy, b) the power developed by the turbine, and c) the area of the turbine inlet.
Q.1 A insulated container is divided into two parts ,one containing the oxygen and other nitrogen at same temperature and pressure. The number of kilo moles of each is 2 and 4 respectively. The partition is removed and the gas is allowed to mix. What is the entropy generated in the process? A 31.751 kJ/K В -37.751 kJ/K C C 24.751 kJ/K D -24.751 kJ/K
3) A cup of rather dilute hot tea initially at 140 degrees F is served to a customer at Howard Johnson's. Unfortunately, before they get around to drinking it, it has spontaneously cooled off to 200 0 100 degrees F. Calculate the change in this process. The temperature of the entropy of the universe for restaurant (the surroundings) is 70 degrees F. (DHD 2/6/22) Suppose that the heat has problem 3, in order to save the inside temperature is been turned off in the HoJo's in money in the cold winter months, and 32 degrees F. The hot tea cools from HOWARD 140 degrees F to 32 degrees F, and then freezes, making it JOHNSON'S impossible to drink. What is the change in entropy of the universe in this case? (DHD 2/6/22) LCE CREAM 28 FLAVORS Restaurant Return to problem 3. Suppose that our customer complains about the cold tea and is given a second cup of hot tea. Feeling especially hungry (for tea?) they mix the hot tea and the cold tea together so that they will have twice as much tea (albeit…