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Two kg water at 200 kPa with a quality of 25% has its temperature raised 20oC in a constant pressure process. What are the heat transfer and work
The volume expansivity of water at 20°C is b = 0.207 x 10-6 K-1. Treating this value as a constant, determine the change in volume of 1 m3 of water
The ventilating fan of the bathroom of a building has a volume flow rate of 30 L/s and runs continuously
At what pressure will the piston touch the second spring? Find the final temperature and the total work done by the ammonia.
Two Carnot heat engines are operating in series such that the heat sink of the first engine serves as the heat source of the second one.
To determine the entropy change for an irreversible process between states 1 and 2, should the integral -1 2 dQ/T be performed along the actual process path
Three SSSF flows are mixed in an adiabatic chamber at 150 kPa. Flow one is 2 kg/s of O2 at 340 K, flow two is 4 kg/s of N2 at 280 K and flow three is 3 kg/s
A flow of air at 5°C, -90%, is brought into a house, where it is conditioned to 25°C, 60% relative humidity.
Two flows are mixed to form a single flow. Flow at state 1 is 1.5 kg/s water at 400 kPa, 200oC and flow at state 2 is 500 kPa, 100oC
Two flow streams of water, one at 0.6 MPa, saturated vapor, and the other at 0.6 MPa, 600°C, mix adiabatically in a SSSF process to produce a single flow
Two different fuels can be used in a heat engine operating between the fuel burning temperature and a low temperature of 350 K.
Two containers are filled with air, one a rigid tank A, and the other a piston/cylinder B that is connected to A by a line and valve.
Take the ambient conditions to be 265 K and 85 kPa. You must solve the problem step wise step.You should include all the units which are needed to accomplish
The temperature of air changes from 0 to 10°C while its velocity changes from zero to a final velocity, and its elevation changes from zero to a final elevation
The turbocharger of an internal combustion engine consists of a turbine and a compressor. Hot exhaust gases flow through the turbine to produce work
The two major forces opposing the motion of a vehicle moving on a level road are the rolling resistance of the tires, Fr, and the aerodynamic drag
The variation of pressure with density in a thick gas layer is given by P = Cpn, where C and n are constants
The turbine in a jet engine receives air at 2200 R, 220 lbf/in 2. It exhausts to a nozzle at 35 lbf/in 2, which in turn exhausts to the atmosphere
The specific heat at constant pressure for an ideal gas is given by cp = 0.9 + (2.7 x 10-4) T (kJ/kg -c K) where T is in kelvin
The products of combustion are flowing through a SSSF heat exchanger with 12% CO2, 13% H2O and 75% N2 on a volume basis at the rate 0.1 kg/s
The pressure of an automobile tire is measured to be 190 kPa (gage) before a trip and 215 kPa (gage) after the trip at a location where the atmospheric pressure
The pump of a water distribution system is powered by a 15-kW electric motor whose efficiency is 90 percent. The water flow rate through the pump is 50 L/s
The sun shines on a 1500 ft2 road surface so it is at 115 F. Below the 2 inch thick asphalt, average conductivity of 0.035 Btu/h ft F, is a layer of compacted
The sun shines on a 150 m2 road surface so it is at 45°C. Below the 5 cm thick asphalt, average conductivity of 0.06 W/m K, is a layer of compacted rubbles
The rate of heat transfer to the surroundings from a person at rest is about 400kJ/h