# Recent questions in Thermodynamics

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# 3D Design a small four-stroke cycle Diesel engine to produce 50 kW

Design a small four-stroke cycle Diesel engine to produce 50 kW of brake power at de- sign speed when installed in a small pickup truck. Average piston speed should not ex- ceed 8 m/sec at design conditions. Give the design speed, displacement, number of cylinders bore, stroke, bmep, and torque. All parameter values should be within typical, reasonable ranges and should be consistent with the other values. State all assumptions you make.
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# By not knowing its components, justify whether the design is possible or not.

A trainee engineer reported to you that he has designed an equipment that uses only 100 oC saturated steam at steady flow, and produces 2000 kJ/kg heat of steam at 170 oC continuously. The engineer did not want to explain the process because he thought it was too complicated. If he told that he was using an existing 0 oC water cooler. By not knowing its components, justify whether the design is possible or not.
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# The standard enthrm carbon dioxide and water) are -1336.0 kJ mol-1 and -1359.2 kJ mol-1respectively. Calculate the

The standard enthalpies of combustion of fumaric acid and maleic acids (to form carbondioxide and water) are -1336.0 kJ mol-1​and -1359.2 kJ mol-1​, respectively. Calculate the​enthalpy of the following isomerization process:
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# A 51ft3 tank contains 3lb of gas at 80F and a vacuum pressure of 24 in Hg

A 51ft3 tank contains 3lb of gas at 80F and a vacuum pressure of 24 in Hg(a) What is the absolute pressure in psia and psfa?(b) What is the gas specific volume and density?(c) What is its temperature in C, R and K?
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