Chapter 6, Problem 6.70P

Q2/ Air is contained in an insulated, rigid volume at 20°C and 200 kPa. A paddle wheel, inserted in the volume, does 720 kJ of work on the air. If the volume is 2m3, calculate the entropy increase assuming constant specifi c heats.

Give me right solution.. Urgent please

Solve it correctly please. I will rate accordingly

Thermodynamics There is a rigid tank initially with water in a critical state, which after a heat transfer process reaches a pressure of 1 psia. The surrounding temperature is 1540°F. Find the total entropy change. Please draw a scheme.

Air as ideal gas in the closed system, find the change of entropy from the initial to the final state, in Btu/lb oR ( degree R ). T1 = 360 oF (degree F), P1 = 14.7 psia T2 = 540 oF (degree F), P2 = 58.8 psia

Thermodynamics: Please show me how to solve the given practice problems in step by step solution.

Helium at 660 K expands in a turbine to 369 K during which 84 kJ/kg of heat was lost to the surroundings which are at 27 oC. The pressure across the turbine was 6.0, What is the magnitude of entropy generation (kJ/kg.K)?

Q6) One kg of air is allowed to expand reversibly in a cylinder behind a piston in an isothermal process at 260°C, while the volume is doubled. The piston is then moved and heat rejected at constant pressure until the volume is the same as it was initially. Find the heat flow and the overall change of entropy.

Q3. 1000 kJ of heat are transferred irreversibly and isothermally at atemperature of 800 K. The temperature of surrounding is 300 K. a. What is the maximum work that can be obtained frome this isothermal heat transfer? b. What is the amount of heat that regected to the surrounding? c. What is the entropy change of the two reservoirs? d. What is the total entropy change? Ans: a. 625 kJ b. 375 kJ c.-1.2, 1.25KJ/k d. zero