A- Answer false or true and correct: 1. For an isolated system which does not undergo any energy interaction with the surroundings, dQ=0. 2. If the volume of a given mass of a gas is doubled without changing its temperature the pressure of the gas is Reduced to 1/3 of the initial value 3. Work represents the energy storage. 4. The expression (EW)cycle=(2Q)cycle applies only to systems undergoing cycles. 5. An increase in enthalpy leads to an increase in internal energy.

A- Answer false or true and correct: 1. For an isolated system which does not undergo any energy interaction with the surroundings, dQ=0. 2. If the volume of a given mass of a gas is doubled without changing its temperature the pressure of the gas is Reduced to 1/3 of the initial value 3. Work represents the energy storage. 4. The expression (EW)cycle=(2Q)cycle applies only to systems undergoing cycles. 5. An increase in enthalpy leads to an increase in internal energy.

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

A cycle composed of three processes, 1-2 : constant volume.2-3 expansion with PV = constant and 3-1: constant pressure, occurs in a piston cylinder assembly. V1=0.025 m^3. U2-U1= 26.4 kJ. P1= 1.8 bar. U2=U3. Work of process 3-1 is equal to -12.3 kJ. Determine the relative increase in the value of Qcycle if the process 2-3 is replaced by a polytropic process with n=1.5. Select one: O a. 88 % b. 65 % O c. 79 % O d. 93 % e. 83 %
A cycle composed of three processes, 1-2: constant volume.2-3 expansion with PV = constant and 3-1: constant pressure, occurs in a piston cylinder assembly. V1=0.025 m^3. U2-U1= 26.4 kJ. P1= 1.8 bar. U2=DU3. Work of process 3-1 is equal to -12.3 kJ. Determine the relative increase in the value of Qcycle if the process 2-3 is replaced by a polytropic process with n=1.3. Select one: a. 68 % b. 70 % c. 38 % d. 51 % e. 46 %
Which of the following are correct and valid for the Kelvin-Plank statement? O a. Any device O b. Kelvin- Planck O c. It is possible for any O d. No heat engine can have a thermal O e. Kelvin- Planck O f. It is impossible O g. It is impossible for any device O h. It is impossible that statement statement to construct to construct of the second law is device that a device that a device that violates of the efficiency of 100 second law is the that operates in a cycle and produces no effect other than Kelvin- operates in a cycle and produces no effect other than operates negative statement, and a operates on a cycle to receive heat from a single reservoir Planck percent, or as for a positive statement, and a positive on a cycle to receive heat statement power plant to operate, the working fluid also violates negative statement the from a statement the transfer the transfer single reservoir and Clausius cannot be can be of heat from and of heat from a lower- temperature body to a higher-…
In a fixed volume tank, there is initially 0.8 kg of superheated water vapor at a temperature of 300°C and a pressure of 1 MPa. The final temperature drops to 120°C by drawing heat from the container and it is observed that the water has partially condensed. According to this; a) Volume of the tank b) Final state dryness x=?c) The amount of heat withdrawn from the tank as absolute value?
Steam Transmission Liquid (c) When the steam in the piston-cylinder assembly expands, the transmission converts the piston motion to rotary motion of a paddlewheel that stirs a viscous liquid. The principal source of irreversibility is
-Gas supply line- Gas A 1.5 m3 tank initially contains a gas at 140 kPa, 340 K. The tank is connected a line carrying same gas at 1400 kPa and 340 K. What should be heat transfer during this process, in kJ, so that the final pressure and temperature are 1400 kPa and 340 K, respectively. (cp=0.72 kJ/kg.K, cv=0.48 kJ/kg.K).
Gas supply line- Gas A 2.1 m3 tank initially contains a gas at 170 kPa, 370 K. The tank is connected a line carrying same gas at 1700 kPa and 370 K. What should be heat transfer during this process, in kJ, so that the final pressure and temperature are 1700 kPa and 370 K, respectively. (cp=D0.92 kJ/kg.K, c=0.64 kJ/kg.K).
A heat engine that rejects waste heat to a sink at 600 R has a thermal efficiency of 36 percent and a second-law efficiency of 54 percent. Determine: a) Tthe temperature of the source that supplies heat to this engine [in Kelvins], b) Draw a schematic diagram.
Req to u solve all need true and false
a) A refrigeration cycle is chosen to maintain a freezer compartment at 10.0°F in a room that is at 90.0°F. If 200. Btu/min are extracted from the freezer compartment by heat transfer and the freezer is driven by a 1.00 hp electric motor, determine the dimensionless coefficient of performance (COP)of the unit, defined as the cooling rate divided by the input power. b) Determine the energy transport rate for the system shown in Figure below. Fuel flow Top heat loss Exhaust flow Epuet=15,000 Btu/min 180,000 Btu/h Ecshaut =500. Btu/min System boundary Engine-generator set 200. hp Bottom heat loss 54,000 Btu/h 50.0 hp Electrical workout
1. The 1st Law of Thermodynamics gives any information on the feasibility of the change of stateor process. The Second Law of Thermodynamics provides the basis as to the probability ofdifferent processes.A. Both statements are correct.B. Both statements are incorrect.C. Statement 1 is correct while Statement 2 is incorrect.D. Statement 1 is incorrect while Statement 2 is correct 2. The ratio of Cp/R is dependent on the unit of the universal gas constant. Its parameters areindependent of temperature and depends on the value of the constant pressure.A. Both statements are correct.B. Both statements are incorrect.C. Statement 1 is correct while Statement 2 is incorrect.D. Statement 1 is incorrect while Statement 2 is correct. 3. A reconstruction has resisted the combined efforts of the government’s militaryestablishments. It can at best be accomplished by a hen fed with the remains of the original. Thisanalogy best represents the concept of ___________.A. Spontaneous ProcessB.…
State if the listed statement is Ture (T) or False (F) and correct the false statement: 1. Thermodynamic is a science of energy 2. Closed system is also called control volume 3. Steam power plant cycle is employed to produce a mechanical and electrical energy 4. In a Carnot cycle, the isothermal process in a boiler and a condenser ( ) 5. Isobaric process means volume is constant 6. Isentropic process means adiabatic and reversible 7. Pump is a device that consumes energy 8. Compressor is a device that raises a pressure of incompressible fluid flow ( ) 9. Thermal efficiency means the output by input 10. Cycle means a group of process that has initial state and final state ( ) ( )