Q 1) Air at (20°C) and (1.05 bar) occupies (0.025 m'). The air is heated at constant volume until the pressure is (4.5 bar), and then cooled at constant pressure back to original temperature. Calculate :- (i) The net heat flow from the air. ii) The net entropy change. (i Sketeh the process on T-s diagram

Q 1) Air at (20°C) and (1.05 bar) occupies (0.025 m'). The air is heated at constant volume until the pressure is (4.5 bar), and then cooled at constant pressure back to original temperature. Calculate :- (i) The net heat flow from the air. ii) The net entropy change. (i Sketeh the process on T-s diagram

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

In a house, room temperatures are desired to be kept constant at 21 ° C. For this purpose, the temperature of the water entering the radiator with a flow rate of 5 kg / min is initially 90 ° C (saturated liquid), but drops to 70 ° C at the radiator outlet. According to this;a) entropy change of waterb) The entropy change of the roomc) Calculate the total entropy change.
Liquid propane at 1.3 MPa, 36°C, and a flow rate of 0.18 kg/s goes through an expansion valve into a flash chamber at 200 kPa. What are the mass flow rates of liquid and vapor propane coming out of the flash chamber?
0.03 m3 of nitrogen contained in a cylinder behind apiston is initially at 1.05 bar and 15ºC. The gas iscompressed isothermally and reversibly until the pressureis 4.2 bar. Calculate the change of entropy, the heat flow,and the work done, and sketch the process on a p-v andT-s diagrams. Assume nitrogen to act as a perfect gas.Molecular weight of nitrogen = 28.
3 kilograms of steam has an initial enthalpy of 7100.111 kJ at 0.14111 Mpa. Isentropically compression gives a final pressure of 0.2111 Mpa. Find initial temperature, initial volume, intial internal energy, final temperature, final enthalpy, and final internal energy.
Draw the PV and TS Diagram of this problem. Steam at 3.1 MPa and with 74.28°C SH rejects 1973.36 kJ/kg of steam heat at constant pressure, determine the a) final temperature and b) the change in specific entropy.
Q2: One mole of air at P: and temperature Ti is compressed at constant volume till its pressure doubled. Then it is allowed to expand reversibly and isothermally to the original pressure and finally restored to the originol temperature by cooling at constant pressure. Sketch the processes on a P-V and calculate the net work done by the
A 653 g/h stream of methyl alcohol, also called methanol, at 6.0atm 10.0C was held at constant pressure, vaporized, and brought to 241.0C. At what rate must heat, be supplied to this system ? Assume that methyl alcohol vapor behaves ideally for the temperature range and pressure given.
One cubic meter of oxygen at initial pressure of 1 bar and a temperature of17°C are compressed isentropically to a volume of 0.50m 3 . Use the specificheat at constant volume and pressure are 0.919 kJ/kgK and 0.659 kJ/kgK,respectively. determine the following: c. change in internal energy, change in enthalpy and change in entropyd. work nonflow and heat transferred
Calculate the change in specific entropy of air undergoing a process from atemperature of 300 K and 100 kPa to 400 K and 500 kPa. For air at 300 K, let cp =1.005 kJ/kg-K and R = 0.287 kJ/kg-K.
5 kg of air at 1300 K and 6 bar is expanded isentropically to 2 bar. Find the outlet temperature,inlet and outlet volume, specific work, total work, and change in entropy due to the expansion. clear writing please
Steam at 7 bar, dryness fraction 0.96, is throttled-down to 3.5 bar. Solve for the change of entropy per unit mass of steam and show the process on T-s diagram.
Calculate the change of entropy(a) of a bath containing water, initially at 20 ◦ C,when it is placed in thermal contact with a verylarge heat reservoir at 80 ◦ C,(b) of the reservoir when process (a) occurs,(c) of the bath and of the reservoir if the bath isbrought to 80 ◦ C through the operation of a Carnotengine between them.The bath and its contents have total heat capacity10^4 J/K .