100 kg of R-134a at 320 kPa are contained in a piston-cylinder device whose volume is...

100 kg of R-134a at 320 kPa are contained in a piston-cylinder device whose volume is 7.530 m³. The piston is now moved until the volume is one-half its original size. This is done such that the pressure of the R-134a does not change. Determine the final temperature and the change in the total internal energy of the R-134a. (Round the final answers to two decimal places.)

Solutions

Expert Solution

Colby Messinger answered 1 year ago

Next > < Previous

Related Solutions

A mass of 0.3 kg of saturated refrigerant-134a is contained in a piston-cylinder device at 240...

A mass of 0.3 kg of saturated refrigerant-134a is contained in a piston-cylinder device at 240 kPa. Initially, 70 percent of the mass is in the liquid phase. Now heat is transferred to the refrigerant at constant pressure until the cylinder contains vapor only. (a) show the process on a P-v and T-v diagrams with respect to saturation lines. Determine; (b) the volume occupied by the refrigerant initially, (c) the work done, and (d) the total heat transfer.

A piston–cylinder device contains 0.85 kg of refrigerant-134a at -10°C. The piston that is free to...

A piston–cylinder device contains 0.85 kg of refrigerant-134a at -10°C. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 10°C. Determine (a) the final pressure, (b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a.

One kilogram of water is contained in a piston-cylinder device at 100 degC. The piston rests...

One kilogram of water is contained in a piston-cylinder device at 100 degC. The piston rests on lower stops such that the volume occupied by the water is 0.835 m3. The cylinder is fitted with an upper set of stops. When the piston rests against the upper stops, the volume enclosed by the piston-cylinder device is 0.841 m3. A pressure of 200 kPa is required to support the piston. Heat is added to the water until the water exists as...

Prob. 4-68 A piston–cylinder device contains 2.2 kg of nitrogen initially at 100 kPa and 25C....

Prob. 4-68 A piston–cylinder device contains 2.2 kg of nitrogen initially at 100 kPa and 25C. The nitrogen is now compressed slowly in a polytropic process during which PV^1.3 = constant until the volume is reduced by one-half. Determine the work done and the heat transfer for this process. 4–69 Reconsider Prob. 4–68. Using EES (or other) software,plot the process described in the problem on a P-V diagram, and investigate the effect of the poly- tropic exponent n on the boundary...

A piston-cylinder device, whose piston is resting on a set of stops, initially contains 2 kg...

A piston-cylinder device, whose piston is resting on a set of stops, initially contains 2 kg of air at 300 kPa and 27ºC. The mass of the piston is such that a pressure of 600 kPa is required to move it upward. Heat is now transferred to the air until its volume doubles. a) Determine the work done by the air and b) the total heat transferred to the air during this process. c) Also, sketch the process on a...

Refrigerant 134a in a cylinder-piston assembly is at 240 kPa with a quality 15% and then...

Refrigerant 134a in a cylinder-piston assembly is at 240 kPa with a quality 15% and then as a result of heat added the quality increases to 45%, what is the change in volume per one unit of mass (m3/kg)? The piston is assumed to move freely but it is sealed tight that does not allow mass exchange.

A piston cylinder device containing 0.5 kg of water has initial volume of 0.5L. The device...

A piston cylinder device containing 0.5 kg of water has initial volume of 0.5L. The device starts and goes through a Carnot cycle and generates 500.3 kJ work. If the maximum temperature that water will reach is 1.5 times the minimum temperature of water and during heat rejection process, water goes from saturated vapor to saturated liquid phase Find: 1. QH & QL for this cycle (10 points). 2. TH & TL for this cycle (10 points). 3. Maximum and...

A piston cylinder device containing 0.5 kg of water has initial volume of 0.5L. The device...

A piston cylinder device containing 0.5 kg of water has initial volume of 0.5L. The device starts and goes through a Carnot cycle and generates 500.3 kJ work. If the maximum temperature that water will reach is 1.5 times the minimum temperature of water and during heat rejection process, water goes from saturated vapor to saturated liquid phase. Find: 1. QH & QL for this cycle . 2. TH & TL for this cycle. 3. Maximum and minimum pressures that...

The volume of 1 kg of helium in a piston-cylinder device is initially 7 m3 ....

The volume of 1 kg of helium in a piston-cylinder device is initially 7 m3 . Now helium is compressed to 3 m3 while its pressure is maintained constant at 150 kPa. Determine the initial and final temperatures of helium as well as the work required to compress it, in kJ. You may assume deal gas behavior.

A piston-cylinder device initially has a volume of 1.5 m3 containing steam at 300 kPa absolute...

A piston-cylinder device initially has a volume of 1.5 m3 containing steam at 300 kPa absolute and 150 oC. It is then heated so it expands at constant pressure until it reaches a temperature of 400 oC. Draw a diagram of the device showing system boundary and flows of energy. What boundary work is done by the cylinder, in kJ, during the expansion? State your assumptions. 1. What is the mass of steam in the piston-cylinder? 2. How much heat...

Subjects