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Hydrogen gas at 35ºC and unknown pressure (State 1) enters a steady, insulated system which has no work interaction with the surroundings.
Half of the gas exits at 2 bars and 90ºC (State 2) and the other half exits at 2 bar and -20ºC (State 3).
Consider hydrogen to be ideal gas with constant specific heats.
Calculate the minimum possible inlet pressure (bar) of hydrogen gas.
Consider a Refrigerant 22 at 0oC that is going through a phase change from the saturated liquid to saturated vapor. Using T-dS equations, calculate the entropy change between these two phases.
The electronic components of a computer are cooled by air flowing through a fan mounted at the inlet of the electronic enclosure. At steady state, air enters at 18oC, 1 atm. For noise control, the velocity of the entering air cannot exceed 0.9 m/s. F..
a stream containing 57 mol n-octane and the remainder ethylene is to be separated by flash distillation. the molar
there is 0.7kg of nitrogen in a piston-cylinder device. initially the nitrogen is at 110kpa and 25 celcius and then it
A single-stage ideal regenerative steam cycle has a boiler pressure and temperature of 5000 kPa and 500 C, and a condensing pressure of 10 kPa. The extraction pressure is 500 kPa. Find (i) the net work, in kJ/kg, (ii) the work ratio, and (iii) the th..
a piston-cylinder assembly of initial volume of 0.6 m3 contains h2o at 500 kpa and 280oc. the system is cooled in a
what is the indentation diagonal length when a load of 0.75 kg produces a vickers hv of 510? calculate the vickers
A frictionless piston-cylinder contains 3.0 kg of H2O and is initially at 300 kPa. The initial volume is 1.0 m3. The water is heated until the temperature is 300 C. If the volume within the system reaches 1.5 m3, the piston hits a set of stops and is..
A gas turbine engine has a pressure ratio of 10, and the intake air is at 90 kPa and 280K. Both the compressor and turbine have an isentropic efficiency of 100% and a regenerator with an effectiveness of 0.8 is used. The highest temperature in the cy..
1 the barometric pressure is reported to be 605.5 torr and the temperature of the water is 22.5 c what is the pressure
an air conditioner uses r134 the condenser pressure is 1400 kpa and the evaporator pressure is 201 kpa. find the cycle
a pendulum consisting of a bob of mass m is suspended from a massless inextensible string of length l in a viscous
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