Recent questions tagged irreversibility

+2 votes

1 answer

What do you mean by reversible and irreversible processes? Give some causes of irreversibility.

asked Mar 31, 2019 in JEE by kratos

+1 vote

1 answer

A constant pressure piston/cylinder contains 2 kg of water at 5 MPa and 100°C. Heat is added from a reservoir at 700°C to the water until

asked Mar 30, 2019 in Mathematics by kratos

+2 votes

1 answer

The surface temperature of the sun is estimated as (a) 6000 °C (b) 12000 °C

asked Mar 23, 2019 in Class 11 by kratos

+1 vote

1 answer

Calculate the irreversibility for the air is at 300 kPa, 17°C with a volume of 0.25 m^3, while at the stops V = 1 m^3. An air line, 500 kPa,

asked Mar 14, 2019 in Mathematics by kratos

+3 votes

1 answer

A car air-conditioning unit has a 0.5-kg aluminum storage cylinder that is sealed with a valve and it contains 2 L of refrigerant R-134a at 500 kPa

asked Mar 10, 2019 in Mathematics by kratos

+3 votes

1 answer

One kg of air at 100 kPa is mixed with one kg air at 200 kPa, both at 300 K, in a rigid insulated tank. Find the final state (P, T) and the entropy

asked Mar 4, 2019 in Mathematics by kratos

+2 votes

1 answer

What is the difference between a nozzle flow and a throttle process?

asked Feb 9, 2019 in Mathematics by kratos

+1 vote

1 answer

A condenser in a power plant receives 5 kg/* steam at 15 kPa, quality 90% and rejects the heat to cooling water with an average temperature

asked Feb 6, 2019 in Mathematics by kratos

+3 votes

1 answer

The high-temperature heat source for a cyclic heat engine is a steady flow heat exchanger where R-134a enters at 80°C, saturated vapor,

asked Jan 31, 2019 in Mathematics by kratos

+1 vote

1 answer

A mass and atmosphere loaded piston/cylinder contains 2 kg of water at 5 MPa, 100°C. Heat is added from a reservoir at 700°C

asked Jan 21, 2019 in Mathematics by kratos

+1 vote

1 answer

Fresh water can be produced from saltwater by evaporation and subsequent condensation. where 150-kg/* saltwater,

asked Jan 18, 2019 in Mathematics by kratos

+3 votes

1 answer

A flow of air at 1000 kPa, 300 K is throttled to 500 kPa. What is the irreversibility? What is the drop in flow availability?

asked Jan 16, 2019 in Mathematics by kratos

+2 votes

1 answer

A condenser in a power plant receives 10 lbm/* steam at 130 F, quality 90% and rejects the heat to cooling water with an average temperature

asked Jan 15, 2019 in Mathematics by kratos

+2 votes

1 answer

A cylinder/piston contains 5 lbm of water at 80 lbf/in.^2, 1000 F. The piston has cross-sectional area of 1 ft^2 and is restrained by a linear spring

asked Dec 29, 2018 in Mathematics by kratos

+1 vote

1 answer

A container is divided into two equal part I and II by a partition with a small **** of diameter d. The two partitions are filled with same ideal gas,

asked Dec 25, 2018 in JEE by kratos

+1 vote

1 answer

A tornado rips *** a 100 m^2 roof with a mass of 1000 kg. What is the minimum vacuum pressure needed to do that

asked Dec 21, 2018 in Class 12 by kratos

+2 votes

1 answer

A rock bed consists of 6000 kg granite and is at 70°C. A small house with lumped mass of 12000 kg wood and 1000 kg iron is at 15°C.

asked Dec 20, 2018 in Mathematics by kratos

+2 votes

1 answer

Hydrogen gas is contained in a rigid container. A second rigid container of equal volume contains oxygen gas.

asked Dec 18, 2018 in Class 12 by kratos

+2 votes

1 answer

Air enters the turbocharger compressor (of an automotive engine at 100 kPa, 30°C, and exits at 170 kPa. The air is cooled by 50°C

asked Dec 15, 2018 in Mathematics by kratos

+1 vote

1 answer

What happens when acetylene is heated in a copper tube at 600°C ?

asked Dec 2, 2018 in Class 12 by kratos

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