Question

A gas contained in a vertical piston–cylinder assembly by a piston with a face area of...

A gas contained in a vertical piston–cylinder assembly by a piston with a face area of 40 in2 and weight of 100 lbf. The atmosphere exerts a pressure of 14.7 lbf/in2 on top of the piston. A paddle wheel transfers 3 Btu of energy to the gas during a process in which the elevation of the piston increases slowly by 4 ft. The piston and cylinder are poor thermal conductors, and friction between the piston and cylinder can be neglected.

Determine the change in internal energy of the gas, in Btu.

Engineering   Mechanical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A gas undergoes a process in a piston–cylinder assembly during which the pressure-specific volume relation is...
A gas undergoes a process in a piston–cylinder assembly during which the pressure-specific volume relation is pv1.2 = constant. The mass of the gas is 0.4 lb and the following data are known: p1 = 160 lbf/in.2, V1 = 1 ft3, and p2 = 300 lbf/in.2 During the process, heat transfer from the gas is 2.1 Btu. Kinetic and potential energy effects are negligible. Determine the change in specific internal energy of the gas, in Btu/lb. Δu⁢=
1- A certain amount of O2, as an ideal gas, is contained in a cylinder-piston system...
1- A certain amount of O2, as an ideal gas, is contained in a cylinder-piston system and develops a process from T1 = 300 K, P1 = 200 kPa to T2 = 1500 K and P2 = 150 kPa. Determine the specific entropy change in kJ / (kg K). 2- A certain amount of H2O in a closed rigid cylinder is cooled from T1 = 800 ° F and P1 = 100 lbf / in2 to P2 = 20 lbf...
Oxygen gas is contained in a piston cylinder assembly at an initial pressure of 1000 kPa...
Oxygen gas is contained in a piston cylinder assembly at an initial pressure of 1000 kPa and expands from 0.2 m3 to 1.0 m3 by a process where PV = constant. The gas has an internal energy change of -200 kJ. Calculate the work (kJ) and the heat transfer (kJ) done during the process.
Ammonia contained in a piston–cylinder assembly, initially saturated vapor at T1 = 4°F, undergoes an isothermal...
Ammonia contained in a piston–cylinder assembly, initially saturated vapor at T1 = 4°F, undergoes an isothermal process to a final specific volume v2 = 5.2 ft3/lb. Determine the final pressure, in lbf/in2, and the final quality, x2.
A gas in confined in a 0.5 ft. diameter cylinder by a piston, on which rests...
A gas in confined in a 0.5 ft. diameter cylinder by a piston, on which rests a weight. The mass of the piston and weight together is 300 lbm. The local acceleration of gravity is 32.16 ft/s^2, and atmospheric pressure is 1 atm (14.7 psi). What is the force in lbf and Newton exerted on the gas by (1) the piston and the weight (F1); (2) P2, the atmosphere (F2), respectively? Compare the two forces.
P2-44 A piston-cylinder assembly of total mass 16 lbm is free to move within a housing....
P2-44 A piston-cylinder assembly of total mass 16 lbm is free to move within a housing. Initially the cylinder contains gas at an absolute pressure of 20 Ibf/in^2 and a volume of 0.07 ft^3 and is at rest. The piston is then moved so that the entire assembly accelerates rightward and reaches a final velocity of 7.5 ft/s. During this process, the gas is compressed to a final pressure of 35 Ibf/in^2 The process is adiabatic, and the pressure is...
Steam, initially at 700 lbf/in.2, 550°F undergoes a polytropic process in a piston–cylinder assembly to a...
Steam, initially at 700 lbf/in.2, 550°F undergoes a polytropic process in a piston–cylinder assembly to a final pressure of 2200 lbf/in.2 Kinetic and potential energy effects are negligible. Determine the heat transfer, in Btu per lb of steam, for a polytropic exponent of 1.4, (a) using data from the steam tables. (b) assuming ideal gas behavior.
One gram-mole of ideal gas is contained in a piston-cylinder assembly. Cp=(7/2)R, Cv=(5/2)R. The gas expands...
One gram-mole of ideal gas is contained in a piston-cylinder assembly. Cp=(7/2)R, Cv=(5/2)R. The gas expands from 3 to 1 atm. Heat of 1000J is transferred to the gas during the process. External pressure maintains at 1 atm throughout. Initial temperature of the gas is 300K. Find work and internal energy change.
An ideal monatomic gas is contained within a cylinder by a moveable piston. The gas is...
An ideal monatomic gas is contained within a cylinder by a moveable piston. The gas is in thermal contact with a heat bath initially at 310 K. What is the change in molar entropy if the gas is heated to 600 K if: A. The piston is blocked B. The piston is allowed to move freely against atmospheric pressure
A vertical, insulated cylinder contains an ideal gas. The top of the cylinder is closed off...
A vertical, insulated cylinder contains an ideal gas. The top of the cylinder is closed off by a piston of mass m that is free to move up and down with no appreciable friction. The piston is a height h above the bottom of the cylinder when supported only by the gas. Sand is now poured onto the piston very slowly until the weight of the sand is equal to the weight of the piston. (a) Find an analytic expression...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT