Calculate entropy is this a reversible process

Reference no: EM13545673

1.A refrigerator compressor compresses 0.5 kg/s of saturated R-134A vapor at -10C to 1000 kPa and 50C. The compresser has a point that is not insulated and losess heat to the surroundings, the temperature of this point is 30C. What is the minimm work consumed by the compressor?

2.air enters an adiabatic nozzle at 4MPa and 400 K with a velocit of 25 m/s. Air at the exit is 2 MPa and a velocity of 160 m/s. Calculate entropy? Is this a reversable process?

3.Use the Muskingum method to route a flood through a reach a river. The base flow is 100 cfs, and the incoming flood flow increases 50 cfs every 2 hr over a 6 hr period and the subsides at the same rate. From past observations the time lag between peaks at the inlet and outlet of the reach is 2.5 hr, and the x coefficient is 0.35. What is the peak discharge at the reach outlet, and when does it occur?

Reference no: EM13545673

Questions Cloud

Calculate the intensive value-piston contains : A piston contains 1 kg of argon gas at 300 K and 1 bar. The initial Volume occupied by the gas is 0.624 m3. Heat, in the amount 104.2 KJ, is added to elevate the temperature of the argon to 500 K while the pressure in the piston remains constant.

Find the maximum possible final elevation-velocity : Consider a piston weighing 990 g which contains 10 g of air at 1 atmosphere and 25?C. Calculate the effects of performing 100 Joule of work on this air-containing piston for the following three situations.

What is the speed of car : Towns A and B in are 80.0 km apart. A couple arranges to drive from town A and meet a couple driving from town B at the lake, L. The two couples leave simultaneously and drive for 2.50 . Car 1 has a speed of 90.0 km/h. If the cars arrive simultaneous..

A balloon is filled with helium : A 10 kg balloon is filled with helium. Its volume is 200 cubic meters. How much gold can it carry in air? How much gold can it carry in water?

Calculate entropy is this a reversible process : Air enters an adiabatic nozzle at 4MPa and 400 K with a velocit of 25 m/s. Air at the exit is 2 MPa and a velocity of 160 m/s. Calculate entropy? Is this a reversable process?

Determine the maximum possible precipitation at new york : Determine the maximum possible precipitation at New York City that may be encountered on a 100 mi^2 drainage area over a 96 hr period.

Determine the rainfall excess in cm : For a design storm specified for an urban area in Tennessee, the depth of rainfall is 2.5 inches (6.35 cm). Initial abstraction in depressions on the pervious and impervious areas was estimated at 0.5 inches (1.27 cm). Infiltration was estimated as 1..

Calculate the area of the reinforcement required : Calculate the area of the reinforcement required( As) in a singly reinforced rectangular beam required to carry an ultimate factored bending moment ( Mu = 140 Kip-ft). Use( f’c=3,000 psi) and( fy=40,000 psi).

The results of these tests are summarized in the following : A series of direct shear test has been performed on a dense well grades sand. all tests were performed on 3.00 in diameter, 1.25 in tall cylindrical specimens. and were run slowly enough to produce the drained condition. The results of these tests ar..

User Account

All Pages