Assignment Thermodynamics

(BMCT 2133)

Notes:

4-5 members (Include Picture)

Form a organization chart.

Please state your assumption if needed for the solution.

Show every step in details of your solution.

1) What is the meaning of entropy?

(2 marks)

2) Give 2 examples of entropy conditions?

(2 marks)

3) 0.5 kg of R-134a is expended isentropically in a closed system from 700 kPa and 40oC to 60 kPa. Determine the work production for this process?

(3 marks)

4) An insulated piston cylinder device contains 5L of saturated liquid water at a isobaric of 150 kPa. An electric resistance heater inside the cylinder is now turned on and 2200 kJ of energy is transferred to the steam. Determine the entropy change of the water during the process.

(4marks)

15

5) An insulated rigid tank contains 2 kg of a saturated liquid vapor mixture of water at 100 kPa. Initially, three quarters of the mass is in the liquid phase. An electric resistance heater placed in the tank is now turned on the kept on until all the liquid in the tank is vaporized. Determine the entropy change of the steam during this process.

(4marks)

All the best!!