Molecular Physics | Thermodynamics Answers

a reversible non flow process of a perfect gas proceeds from a pressure of 400 psia to a pressure of 100 psia with a corresponding increase in specific volume of the gas from 0.518ft^3/lb to 2.072 ft^3/lb. during the process the internal energy remains constant at 95.76 BTU/lb. calculate the: a. the enthalpy of the gas at 400 psia and 0.518 ft^3/lb in BTU/lb b. the change of enthalpy between the initial and final states

One pound of saturated steam at 689.5 kPa is compressed in a reversible non-flow process from the specific volume of 0.2768 m?/kg to a specific volume of 0.001107 m3/kg. If the pressure remains constant at 689.5 kPa and the internal energy decreases 1878.2 kJ/kg during the process, determine how much heat will be transferred and whether it will be added to our abstracted from the working substance .

steam at pressure of 50 psia and a temperature of 281°F has an internal energy of 109.6 BTU/lb. at these conditions the specific volume of the steam is 8.518 ft^3/lb. determine the enthalpy of the steam in BTU/lb

a working substance enters a thermodynamics steady flow system with the following conditions: p1= 20 psia, v1= 11.7 ft^3/lb, u1=101.6 BTU/lb, v1=150 ft/sec. the working substance leaves the system with the following conditions: p2=25 psia, v2=10.3 ft^3/lb, u2=149.0 BTU/lb, v2=500 ft/sec. Changes in elevation through the system are negligible, and 10 BTU/lb transferred heat is added to the fluid as it passes through the system. Determine the work done on or by the fluid, BTU/lb

The power delivered by an auxiliary turbine is 500,000 Btu /hr when the steam flow is 4000 lb/hr. Find a. the specific work in ft·lbf/lb b. The power delivered, Hp

at a certain mountain location where the barometer reads 13.5 psia, the intake manifold gauge on a cross-country truck reads 20 inches of mercury vacuum. calculate the absolute pressure in the truck intake manifold, psia and in. of Hg.

a steam turbine develops 200 horsepower while receiving 400 BTU from each pound of steam passing through the turbine. calculate the pounds of steam per hour required by the turbine to produce this power

A steam turbine develops 149 kW while receiving 930 kJ from each kilogram of steam passing through the turbine. Calculate the kilograms of steam per hour required to produce this power (in kg/hr).

many marine steam propulsion plants achieve a fuel rate of 0.45 pound of fuel per shaft horsepower hour. determine the equivalent fuel rate in kilograms per shaft kilowatt hour

a small air compressor delivers 1 lb per min of air while supplying 3 horsepower to the air. calculate the specific work, ft-lbf/lb, supplied to the air