De A vessel is divided by a frictionless piston into twoequal parts of 04 m³ each, as in Figure P5.39. Onepart contains steam at 700 kPa and quality r = 0.16,whereas the other part contains air. The vessel iscooled slowly by a thermostatic bath, at the highestpossible temperature, till it contains saturated liquid.SteamAirFIGURE P5.39a. Find the mass of steam and that of air in the vessel.b. Find the final pressure of air.c. Find the work and heat interactions of the steam in the process.d. Find the temperature of the bath.e. Find the change in entropy of the steam.

The surfaces of heat exchangers can be designed for heating or cooling. Jacketed vessels are…

Answered: A vessel is divided by a frictionless…

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

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Air flows steadily through an engine at constant temperature 400 K.Find the work per kilogram if the exit pressure is one third the inlet pressure and the inlet pressure is 207 KPa. Assume that the kinetic energy and potential energy variation is negligible.
Air at 15 degree Celsius and 95 kpa enters the diffuser of a jet engine and steadily with a velocity of 250 m/s. The inlet area of the diffuser is 0.5 m^2. The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Find the mass flow of air, temperature of air leaving diffuser, power and rate of heat transfer within diffuser.
A pump delivers gasoline ( = 685.75 kg/m3) at 20°C and 13.65 m3/h. At the inlet, P1 = 112.5 kPa, z1 = 1.25 m and V1 = 2.75 m/s. At the output, P2 = 555 kPa, z2 = 5 m and V2 = 3.375 m/s. How much power is required if the motor efficiency is 77.5%?
Find the change of U or internal energy in Btu if a closed gaseous system undertakes a reversible processthrough which 25 Btu are rejected, the volume shifting from 5 ft³ to 2 ft³, and the pressure staysconstant at 50 psia.
The Figure shows a solar collector panel embedded in a roof. The panel, which has a surface area of 24 ft2, receives energy from the sun at a rate of 200 Btu/h per ft2 of collector surface. Twenty-five percent of the incoming energy is lost to the surroundings. The remaining energy is used to heat domestic hot water from 90 to 120°F. The water passes through the solar collector with a negligible pressure drop. Neglecting kinetic and potential effects, determine at steady state how many gallons of water at 120°F the collector generates per hour.
An oxygen gas R = 0.2598 KJ/kg°k and k = 1.395. If 4 kg of oxygen undergo a reversible non flow constant pressure process from initial volume =1.2 cubic meter and initial pressure = 690 kPa to a state where final temperature = 600°C. Find intial temperature. B) Change in internal energy. C) Change in enthalpy
Develop the general energy balance applied to closed systems
Check all that are true In a reversible process: (For some reason I am not able to get the right answers every time, so I need your help!)
A ventilation system includes a fan with a mechanical efficiency of 45% against a static pressure of 30cm WG. If the total pressure created by fan is 300m of air, what is the static efficiency?
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?
5.) Find the temperature , specific volume ,internal energy ,enthalpy ,entropy of saturated steam at a pressure of 850 psia . 6.) Find the pressure ,specific volume ,internal energy ,enthalpy ,entropy of saturated water at 100 F.
For a system entropy is constant if initialvolume & Pressure of a gas is 10m^3 ,7 barrespectively. Final volume is 5m^3 then find the final pressure.

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