An automobile tire initially contains 0.25lb of air at 30psig, 70F and has an automatic valve that releases air whenever the pressure exceeds 32psig. After driving, the temperature of air inside rose to 90F. What mass of air escapes into the atmosphere?

Q: Water at a temperature of 400oF has a quality of 0.7. The internal energy of the water is ________…

A: given temperature ofwater , T=400oF=204.444oCquality, x=0.7

Q: 1.1 Determine the electrical power supplied to a boiler when the temperature of the entering water…

A: Consider the following diagram for the boiler system, the heat input is Ql and heat loss from the…

Q: Q5. What is the change in enthalpy (in Btu/lb) of carbon dioxide gas if the change in internal…

A:

Q: a rigid 3ft ^3 vessel contains R-134 a originally at -20 F and 27.7 percent quality. The refrigerant…

A: Given Data Initial temperature is: T1=-20°F Final temperature is : T2=100°F Dryness fraction is :…

Q: Determine the mass flow rate of air entering the air-handling unit, in lb/s, the volumetric flow…

A:

Q: Refrigerant 134a enters an insulated diffuser as a saturated vapor at 120°F with a velocity of 1200…

A: Given Data Refrigerant R-134a Inlet:120°F, saturated vapor, 1200 ft/s, 1.4 in2 Outlet:400 psi…

Q: One-quarter Ibmol of oxygen gas (O2) undergoes a process from p1 = 20 lbf/in2, T1 = 500°R to p2 =…

A:

Q: A cylinder of refrigerant vapor is compressed to a volume half of the original volume, state…

A: Original volume = Vi  Final volume = Vf = Vi/2  Original pressure, Pi = 50 psia Let new pressure be…

Q: Two kilograms of air are heated from 300 to 500 K. Find the change in enthalpy by assuming a.…

A:

Q: Air occupies a 0.5-m' tank. It starts at a pressure of 5 bar and a temperature of 300 K. Energy…

A:

Q: T/F: The latent heat of vaporization is the energy required to change the state without changing the…

A: We need to explain The statement  The latent heat of vaporization is the energy required to change…

Q: D. How many Btu need to be added to change 5 lb of ice at 30°F to steam at 215°F? Refer to tables…

A:

Q: A rigid container, perfectly insulated against heat, is divided into two compartments by a curtain.…

A: Solution:

Q: 4. Saturated liquid at 300°C the internal energy (u) is A. 2563.6 kJ/kg *************** B. 2345.4…

A: Givensaturated liquid at 300oC

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.