Solution manual
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Thermodynamics
By hipolito STa. maria
Answered by: Unknown
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Thermodynamics by hipolito STa. maria Chapter 2 Solutions, Exams of Thermodynamics
Solutions hsdgvchsfchassascjbbacfbacfbajkbcfejasbfcejasbfvesjfvb
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2019/2020
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Solution manual
of
Thermodynamics
By hipolito STa. maria
Answered by: Unknown
Chapter 2
1). Assuming that there are no heat effects and no frictional effects, find the kinetic energy and speed of a 3220-l ody after it falls !!" ft from rest. #tart with the steady flow e$uation, deleting energy terms which are irrele%ant.
#olution&
'o heat transfer( * 0 h!!" ft k+
'oenthalpy(* 0 m* 3220 - l *
V=224ft/sV=224ft/s
- A reciprocating compressor draws in 00 cuic feet per minute of air whose density is 0.0! lcu.ft and discharges it with a density of 0.304 lcu.ft. At the suction, p1* 1 psia( at discharge, p 2 * "0 psia. 5he increase in the specific internal energy is 33." 6tul and the heat transferred from the air y cooling is 13 6tul. 7etermine the work on the air in 6tumin and in hp. 'eglect change in kinetic energy.
#olution&
W = - 2384.378 BTU/minW = - 2384.378 BTU/min W= 56.235 hpW= 56.235 hp
- A thermodynamic steady flow system recei%es 4.9 kg per min of a fluid where p 1 *13!.0 k/a, % 1 *0.03"" m 3 kg, Ѵ 1 *122 ms, and u 1 *1!. k:kg. 5he fluid lea%es the system at a oundary where p 2 *1.9 k/a, % 2 *0.13 m 3 kg, Ѵ 2 *1"3 ms and u 2 *2."0 k:kg. 7uring the passage through the system the fluid recei%es 3000 :s of heat. 7etermine the work.
#olution&
W= - 486 kJ/minW= - 486 kJ/min
W= - 122 kWW= - 122 kW
- =n a steady flow apparatus, 13 k: of work is done y each kg of fluid. 5he specific %olume of the fluid, pressure, and speed at the inlet are 0.3! m^3 kg, 900 k/a, and 19 ms. 5he inlet is 32 m ao%e the floor, and the discharge pipe is at the floor le%el. 5he discharge conditions are 0.92m 3 kg, 100 k/a, and 2!0 ms. 5he total heat loss etween the inlet and discharge is k:kg of fluid. =n flowing through this apparatus, does the specific internal energy increase or decrease, and y how much
#olution&
- Steam enters a turbine stage with an enthalpy of 32! "#$"g at 7% m$s and lea&es the same stage with an enthalpy of 2!' "#$"g and a &elocity of (2' m$s. Calculate the wor" done by the steam.
#olution&
W= -776.762 kJ/kgW= -776.762 kJ/kg