Determine the specific internal energy at the final state

Assignment Help Mechanical Engineering

Reference no: EM13711556

A vertical piston/cylinder device contains 0.01 lbm of gas. The initial gas volume is 0.18 ft3 and the initial specific internal energy is 282 Btu/lbm. The piston, with a mass of 110 lbm and cross-sectional area of 0.11 ft2, is in equilibrium with the gas. The outside ambient pressure is 14.7 psia. Heat transfer in the amount of 1.85 Btu/lbm occurs from the gas to the surroundings. The final gas volume is 0.09 ft3. Assume piston movement is slow with no acceleration. Friction between the piston and cylinder is negligible.

a. Determine work [Btu/lbm] during the process (magnitude and direction)

b. Determine the specific internal energy at the final state u2 [Btu/lbm]

Reference no: EM13711556

Questions Cloud

What is the volume occupied by each gas at equilibrium : An insulated rigid container is separated into two parts using a partition that is free to move and the partition allows heat transfer without any energy storage by itself. Initially 2 kg of air at 5 bar and 350 K is contained on one side of the part..

Gas is contained in a vertical piston-cylinder assembly : Gas is contained in a vertical piston-cylinder assembly. The initial volume of the gas is 0.1 m3 and the initial pressure is 500 kPa. The gas undergoes a quasi equilibrium expansion process to a final volume of 0.25 m3. For each case below, determine..

Determine the heat transfer for the process : A closed system of mass 10 kg undergoes a process during which there is energy transfer by work from the system of 0.147 kJ/kg, an elevation decrease of 50 m, and an increase in velocity from 15 m/s to 30 m/s. The specific internal energy decreases b..

The rate of heat transfer from the air to the walls is small : A 1.5 kilowatt heater is to be used to heat a room with dimensions 3.5 m × 5.0 m × 3.0 m. There are not heat losses from the room, but the room is not airtight, so that the pressure in the room is always atmospheric. Consider the air in the room to b..

Determine the specific internal energy at the final state : A vertical piston/cylinder device contains 0.01 lbm of gas. The initial gas volume is 0.18 ft3 and the initial specific internal energy is 282 Btu/lbm. The piston, with a mass of 110 lbm and cross-sectional area of 0.11 ft2, is in equilibrium with th..

Find the reservoir that the stream of water exiting nozzle : A fire truck draws water from an open constant-level reservoir through a hose of 0.2 ft2 cross section. The water is discharged from the pump through another 0.2 ft2 hose to a surge tank pressurized to 120 psig with air at the top. The pump adds 970 ..

Determine the volume and height of the cooling tower : A counter flow cooling tower cools 2000 gal/min water from 104 F to 85 F with 210,000 ft^3/min of air at 90 F Dry bulb Temperature and 76 F WBT . The Mass transfer coefficient -surface area product is hA= 123lbm/hr ft^3. Air mass flow rate per unit c..

Torsion and direct compression in the base of the boom : A work platform is elevated on the end of a boom that has the ability to extend its length and vary its angle with respect to the ground. The platform width is large compared to the boom diameter so that it is possible to load the boom eccentrically ..

Determine net rate of heat transfer for ambient reservoir : A heat pump supplies 40 kW of heat to maintain the inside of a house at 25 degree C in cold winter months when the ambient temperature is 00C. Power required to operate the heat pump cycle is provided by a heat engine cycle which receives 10 kW of he..

User Account

All Pages