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The specific heat at constant volume for an ideal gas is given by cv = 0.7 + (2.7 x 10-4) T (kJ/kg -c K) where T is in kelvin.
The solubility of nitrogen gas in rubber at 25°C is 0.00156 kmol/m3 -c bar. When phase equilibrium is established, the density of nitrogen in a rubber piece
The gage pressure of the air in the tank shown in Fig is measured to be 80 kPa. Determine the differential height h of the mercury column.
The enthalpy of formation of magnesium oxide, MgO(s), is -601827 kJ/kmol at 25°C. The melting point of magnesium oxide is approximately 3000 K
The equilibrium constant for the reaction H2 + at 1 atm and 1500°C is given to be K. Of the reactions given below, all at 1500°C
The cylinder volume below the constant loaded piston has two compartments A and B filled with water. A has 0.5 kg at 200 kPa, 150oC and B has 400 kPa
The barometer shown in Fig contains mercury (Hg=13.59 g/cm3). If the local atmospheric pressure is 100 kPa and g = 9.81 m/s2
The density of mercury changes approximately linearly with temperature as ?Hg = 13595 - 2.5 T kg/ m3 T in Celsius so the same pressure difference will result
The air in a room has a dry-bulb temperature of 80°F and a wet-bulb temperature of 65°F
The air in a 6-m = 5-m = 4-m hospital room is to be completely replaced by conditioned air every 15 min.
The average body temperature of a person rises by about 2°C during strenuous exercise. What is the rise in the body temperature in?
Superheated water vapor at 180 psia and 500°F is allowed to cool at constant volume until the temperature drops to 250°F.
The absolute pressure in water at a depth of 5 m is read to be 145 kPa. Determine
Small solid particles formed in combustion should be investigated. We would like to know the sublimation pressure as a function of temperature.
Saturated vapor water at 150oC is expanded to a lower pressure with constant temperature. Find the changes in u and s when the final pressure is.
Saturated vapor R-134a at 50oC changes volume at constant temperature. Find the new pressure, and quality if saturated, if the volume doubles.
Oxygen at 300 kPa, 100°C is in a piston/cylinder arrangement with a volume of 0.1 m3. It is now compressed in a polytropic process with exponent
Oxygen (O2) gas within a piston-cylinder assembly undergoes an expansion from a volume V1= 0.01 m3 to volume V2 = 0.03 m3.
Pentane is burned with 120% theoretical air in a constant pressure process at 14.7 lbf/in 2. The products are cooled to ambient temperature, 70F
Propylene (C3H6) is burned with 50 percent excess air during a combustion process. Assuming complete combustion and a total pressure of 105 kPa
Propane C3H8 is burned with air, and the combustion products consist of CO2, CO, H2O, O2, N2, OH, H2, and NO. The number of equilibrium constant relations
One alternative to using petroleum or natural gas as fuels is ethanol (C2H5OH), which is commonly produced from grain by fermentation.
Nitrogen (N2) gas within a piston-cylinder assembly undergoes a compression from p1= 0.2MPa, V1=2.75 m3 to state where p2 =2MPa.
Methane is contained in a piston-cylinder device and is heated at constant pressure of 4 MPa from 100 to 350°C.
Methane gas (CH4) at 25°C is burned with the stoichiometric amount of air at 25°C during an adiabatic steady-flow combustion process at 1 atm.