Question

Thermodynamics: A 12 kg steel sphere contains 0.6 kg water at 2 MPa, 250 oC. The...

Thermodynamics:

A 12 kg steel sphere contains 0.6 kg water at 2 MPa, 250 oC. The whole system (i.e., water + steel) cools to the ambient temperature, 30 oC. Find the entropy generation for this cooling process

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 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 steam turbine has an inlet of 3 kg/s water at 1.2 MPa, 500°C with velocity...
A steam turbine has an inlet of 3 kg/s water at 1.2 MPa, 500°C with velocity of 16 m/s. The exit is at 150 kPa, 250°C and very low velocity. Find the power produced and the rate of entropy generation.
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.
Steam enters an adiabatic turbine at 5 Mpa 500 oC with a mass flow rate of...
Steam enters an adiabatic turbine at 5 Mpa 500 oC with a mass flow rate of 2 kg/s and leaves at 100 kpa. The isentropic efficiency of the turbine is 90%. Find (12 points) (a) Actual work output of the turbine _______________ (7 points) b) Maximum work output of the turbine_______________(3 points) (c) Entropy change during this process __________________________(2 points)
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.
Q 11: One container holds 0.10 kg of water at 75 ∘C and is warmed to...
Q 11: One container holds 0.10 kg of water at 75 ∘C and is warmed to 95 ∘C by heating from contact with the other container. The other container, also holding 0.10 kg of water, cools from 35 ∘C to 15 ∘C. Specific heat of water is 4180 J/kg⋅∘C. Part A: Estimate the total change in entropy of two containers of water using the actual temperatures to determine the heat transferred to each container and the average temperatures to determine...
A closed, rigid steel tank contains 1 lbm of water, initially at 260 F and a...
A closed, rigid steel tank contains 1 lbm of water, initially at 260 F and a quality of 60%. The tank is fitted with a paddle wheel and the water is stirred until the temperature is 350 F. The tank is well insulated on the outside and the steel is in thermal equilibrium with the water. The mass of the steel tank itself (not including water) is 60 lbm and the specific heat of the tank is 0.115 Btu/lbm·R. Changes...
a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to...
a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to cooling airflow at 27 0C resulting in the convective coefficient, h = 114 W/ m2 K. The relevant properties of mild steel are given as follows: Density , /7850 2 mkg  Specific heat K kgJc p / 475 and thermal diffusivity hr m /043.0 2  Determine: (i) Time required to cool the sphere (lumped parameter system) from 540 0C to 950C. [7...
A closed, rigid steel tank contains 1 lbm of water, initially at 260F and a quality...
A closed, rigid steel tank contains 1 lbm of water, initially at 260F and a quality of 60%. The tank is fitted with a paddle wheel and the water is stirred until the temperature is 350F. The tank is well insulated on the outside and the steel is in thermal equilibrium with the water. The mass of the steel tank itself (not including water) is 60 lbm and the specific heat of the tank is 0.115 Btu/lbm·R. Changes in kinetic...
A piston cylinder device contains 0.15 kg of air initially at 2 MPa and 350 C....
A piston cylinder device contains 0.15 kg of air initially at 2 MPa and 350 C. First, the air expands isothermally to a pressure of 500 kPa. Then, it is compressed polytropically back to the initial pressure (2 MPa) with a polytropic exponent of 1.2. Find the work performed or introduced by or to the air for each process. Express it both times in kJ.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT