Question

In: Mechanical Engineering

A spring-loaded piston-cylinder device contains 0.5 kg of water initially at 90℃ and with an initial quality of 20.9%.

A spring-loaded piston-cylinder device contains 0.5 kg of water initially at 90℃ and with an initial quality of 20.9%. At its initial state, the spring is relaxed and does not exert any force on the piston. The device is now heated until the pressure is 400 kPa and the new temperature is 250℃.

What is the boundary work done by the water during this process?

kJ

What is the total amount of heat transfer into the system?

kJ

BONUS: If the device has a cross-sectional area of 0.14 m2, what is the spring constant of the spring in this device?

kNm

Solutions

Expert Solution


Related Solutions

The spring-loaded piston–cylinder device shown in the figure is filled with 0.55 kg of water vapor...
The spring-loaded piston–cylinder device shown in the figure is filled with 0.55 kg of water vapor that is initially at 4 MPa and 400°C. Initially, the spring exerts no force against the piston. The spring constant in the spring force relation F = kx is k = 0.9 kN/cm and the piston diameter is D = 20 cm. The water now undergoes a process until its volume is one-half of the original volume. Calculate the final temperature and the specific...
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...
A spring loaded piston cylinder device contains 3 kg of carbon dioxide which can be assumed...
A spring loaded piston cylinder device contains 3 kg of carbon dioxide which can be assumed to be an ideal gas. The system is heated from 110 kPa, 23C to 1100kPa, 305C. What is the work done during this process? What is the heat transfer during this process?
Problem1. A piston cylinder device containing 0.5 kg of water has initial volume of 0.5L. The...
Problem1. 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...
A piston–cylinder device initially contains 2 kg water in 1 m3 at 500 kPa. The system...
A piston–cylinder device initially contains 2 kg water in 1 m3 at 500 kPa. The system then cools down and the volume drops to half and pressure of 300 kPa. At this state, the piston is resting on a set of stops, and the mass of the piston is such that a pressure of 500 kPa is required to move it. (a) Show the process on a P-v, T-v and P-T diagrams with respect to saturation lines and determine, (b)...
A weighted piston-cylinder device (pressure is not constant) initially contains 1.2 kg saturated liquid water at...
A weighted piston-cylinder device (pressure is not constant) initially contains 1.2 kg saturated liquid water at 190oC. Now heat is transferred to the water until the volume quadruples (increase four times) and the cylinder contains saturated vapor only. Determine: a) The final volume of the tank. b) The final temperature and pressure. c) The internal energy change of the water.
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...
A spring loaded piston cylinder contains 1.5 kg of air at 27°C and 160 kPa. It...
A spring loaded piston cylinder contains 1.5 kg of air at 27°C and 160 kPa. It is now heated in a process where pressure is linear in volume, P = A + BV, to twice the initial volume where it reaches 900 K. Find the work, the heat transfer and the total entropy generation assuming a source at 900 K. Is this a possible process?
A piston?cylinder device initially contains 1.5?kg saturated liquid water at 120°C. Now heat is transferred to...
A piston?cylinder device initially contains 1.5?kg saturated liquid water at 120°C. Now heat is transferred to the water until the volume increases 100 times. Determine: a. Initial Volume of the water. b. Final volume of water. c. Final state of water. d. Amount of heat added to the water e. Draw the T?s diagram
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT