Question

A well-insulated (no heat transfer) piston cylinder contains 2 kg of saturated water vapor at 1...

A well-insulated (no heat transfer) piston cylinder contains 2 kg of saturated water vapor at 1 MPa. Steam expands reversibly until the pressure drops to 0.5 MPa. Find the final temperature of water and the work done during the expansion in kJ.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A piston-cylinder device initially contains 75 g of saturated water vapor at 340 kPa . A...
A piston-cylinder device initially contains 75 g of saturated water vapor at 340 kPa . A resistance heater is operated within the cylinder with a current of 0.6 A from a 300 V source until the volume doubles. At the same time a heat loss of 7 kJ occurs. Part A)Determine the final temperature (T2). Part B)Determine the duration of the process. Part C) What-if scenario: What is the final temperature if the piston-cylinder device initially contains saturated liquid water?
Entropy From Steam Tables A piston-cylinder assembly contain 2 kg of water. The water is initially...
Entropy From Steam Tables A piston-cylinder assembly contain 2 kg of water. The water is initially at the pressure of 0.5 MPa and the temperature of 300°C. The water is cooled down at constant pressure process until it is a saturated vapor. Determine the change in the entropy of the system.
A piston-cylinder apparatus contains 4 kg of saturated liquid water at 35˚C. The piston’s cross sectional...
A piston-cylinder apparatus contains 4 kg of saturated liquid water at 35˚C. The piston’s cross sectional area is 0.06 m2 , and initially it is resting on stops, enclosing a volume of 0.03 m3 . To raise the piston, a pressure of 300kPa has to be applied. Heat is transferred until the volume is 0.075 m3 , at which point the piston encounters a linear spring. To deflect the spring 1 m, a force of 360 kN is required. More...
Water, initially (state 1) a saturated liquid at 1100C, is contained in a piston-cylinder assembly. The...
Water, initially (state 1) a saturated liquid at 1100C, is contained in a piston-cylinder assembly. The water undergoes a process to the corresponding saturated vapor (state 2), during which the piston moves freely in the cylinder. If the change of state is brought about by heating the water as it undergoes an internally reversible process at constant pressure and temperature, determine (a) heat transfer using first law of thermodynamics in kJ/kg and (b) heat transfer using second law of thermodynamics...
1 kg of water in a piston cylinder arrangement is initially in a saturated liquid state...
1 kg of water in a piston cylinder arrangement is initially in a saturated liquid state at 1 bar. It undergoes expansion at constant pressure due to external heat supply to it, to a final state of saturated vapor. (i) What is the initial temperature of water in C? (a) 93.50 (b) 96.71 (c) 99.63 (d) 111.4 (e) 12.2 (ii) What is the change in enthalpy of water (kJ/kg-K)? (a) 417.46 (b) 2258.0 (c) 2675.5 (d) 2506.1 (iii) What is...
a plunger cylinder device contains 0.8 kg of water at 4 Mpa and 500 ° C,...
a plunger cylinder device contains 0.8 kg of water at 4 Mpa and 500 ° C, it begins to lose heat causing the piston to descend to a set of stops inside the cylinder, at which point saturated steam is obtained through an isobaric process. Cooling continues until the cylinder contains water at 1 atm pressure. The heat transferred during this process is kJ
A piston-cylinder device contains 3.2 kg of air at 400 kPa and 10°C. Heat is transfered...
A piston-cylinder device contains 3.2 kg of air at 400 kPa and 10°C. Heat is transfered to air and the piston is allowed to expand at constant pressure until its temperature reaches 50°C. The work done during this expansion process is: Use kj units
A piston-cylinder contains 25 g of saturated water vapor and kept at 300 kPa. We add...
A piston-cylinder contains 25 g of saturated water vapor and kept at 300 kPa. We add to the saturated water vapor an amount of electrical work of 7.2 kJ (via a resistance heater). Simultaneously, we lose 3.7 kJ from the water. 1.Show the path on a PV diagram. 2.Determine the change in internal energy, the PV work, and the enthalpy of the system. 3.Determine the final temperature of the system
A mass of one kg of water within a piston–cylinder assembly undergoes a constant-pressure process from...
A mass of one kg of water within a piston–cylinder assembly undergoes a constant-pressure process from saturated vapor at 500 kPa to a temperature of 260°C. Kinetic and potential energy effects are negligible. For the water: a) Evaluate the work, in kJ, b) If the work is 30 kJ, evaluate the heat transfer, in kJ, c) If the heat transfer is negligible, evaluate the entropy production in kJ/K d) Determine if the process is reversible, irreversible, or impossible.
If there is a piston cylinder that only has boundary work involved. If also, it contains...
If there is a piston cylinder that only has boundary work involved. If also, it contains 1 kilogram of steam that in the first state is a saturated vapor at 500 kPa. The system is cooled in a reversible isothermal partial phase change until the quality is 0.5. What is the work and heat transfer of the system?