Argon in a light bulb is at 90 kPa and heated from 20 C to 60 C with electrical power. Find the total entropy generation per unit mass of argon.

Argon in a light bulb is at 90 kPa and heated from 20 C to 60 C with e

1.	Argon in a light bulb is at 90 kPa and heated from 20 C to 60 C with electrical power. Find the total entropy generation per unit mass of argon.
A.	0.01 kJ/kg K
B.	0.02 kJ/kg K
C.	0.03 kJ/kg K
D.	0.04 kJ/kg K
Answer» E.

Discussion

No Comment Found

Related MCQs

Oxygen gas in a piston cylinder at 300 K, 100 kPa with volume 0.1m^3 is compressed in a reversible adiabatic process to a final temperature of 700 K. Find the final pressure and volume.
Argon in a light bulb is at 90 kPa and heated from 20 C to 60 C with electrical power. Find the total entropy generation per unit mass of argon.
A pan contains 5 L of engine oil at 20 C, 100 kPa. Now 2 L of hot 100 C oil is mixed into the pan. Find the entropy generation.
A 4 L jug of milk at 25 C is placed in refrigerator where it is cooled down to a temperature of 5 C. Assuming the milk has the property of liquid water, find the entropy generated in the cooling process.
1kg of ammonia is contained in a piston/cylinder, as saturated liquid at 20 C. Heat is added at 100 C until a final condition of 70 C, 800 kPa is reached. Assuming the process is reversible, find the entropy generation.
A piston/cylinder contains 1 kg water at 20 C, 150 kPa. The pressure is linear in volume. Heat is added from 600 C source until the water is at 1 MPa, 500 C. Find the total change in entropy.
A piston cylinder has 2.5 kg ammonia at -20 C, 50 kPa. It is heated to 50 C at constant pressure from external hot gas at 200 C. Find the total entropy generation.
A hot metal piece is cooled rapidly to 25 C, removing 1000 kJ from the metal. Calculate the change of entropy if energy is absorbed by vaporizing liquid nitrogen at 101.3 kPa pressure.
A hot metal piece is cooled rapidly to 25 C, removing 1000 kJ from the metal. Calculate the change of entropy if energy is absorbed by ice.
A hot metal piece is cooled rapidly to 25 C, removing 1000 kJ from the metal. Calculate the change of entropy if saturated liquid R-22 at 20 C absorbs the energy so that it becomes saturated vapor.

Argon in a light bulb is at 90 kPa and heated from 20 C to 60 C with electrical power. Find the total entropy generation per unit mass of argon.

Discussion

No Comment Found

Related MCQs

Reply to Comment