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Thermodynamics



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Q1. A piston cylinder contains 0.5 kg of air at 500 kPa and 500 K. The air expands in a process so pressure is linearly decreasing with volume to a final state of 100 kPa and 300 K. Find the work in the process.

(a) 56.1 kJ
(b) 66.1 kJ
(c) 76.1 kJ
(d) 86.1 kJ

Q2. A piston cylinder contains air at 600 kPa, 290 K and a volume of 0.01m^3. A constant pressure process gives 54 kJ of work out. Find the final volume of the air.

(a) 0.05 m^3
(b) 0.01 m^3
(c) 0.10 m^3
(d) 0.15 m^3

Q3. The work done by a closed system in a reversible process is always ___ that done in an irreversible process.

(a) less than or more than
(b) equal to
(c) less than
(d) more than

Q4. Which of the following is mostly neglected while doing calculations for finding maximum work?

(a) KE
(b) PE
(c) both of the mentioned
(d) none of the mentioned

Q5. Which of the following is true for a closed system?

(a) mass entering = mass leaving
(b) mass does not enter or leave the system
(c) mass entering can be more or less than the mass leaving
(d) none of the mentioned

Q6. Which of the following is true for a steady flow system?

(a) mass entering = mass leaving
(b) mass does not enter or leave the system
(c) mass entering can be more or less than the mass leaving
(d) none of the mentioned

Q7. In an open system, for maximum work, the process must be entirely

(a) irreversible
(b) reversible
(c) adiabatic
(d) none of the mentioned

Q8. Which of the following is true?

(a) Q for reversible > Q for irreversible and work for reversible < work for irreversible
(b) Q for reversible > Q for irreversible and work for reversible < work for irreversible
(c) Q for reversible < Q for irreversible and work for reversible < work for irreversible
(d) Q for reversible > Q for irreversible and work for reversible > work for irreversible

Q9. For a process from state 1 to state 2, heat transfer in an irreversible process is given by

(a) Q for irreversible=(To)*(S1-S2)
(b) Q for irreversible>(To)*(S1-S2)
(c) Q for irreversible<(To)*(S1-S2)
(d) none of the mentioned

Q10. For a process from state 1 to state 2, heat transfer in a reversible process is given by

(a) Q for reversible=(To)*(S1-S2)
(b) Q for reversible=(To)*(S2-S1)
(c) Q for reversible=(To)/(S1-S2)
(d) Q for reversible=(To)/(S2-S1)


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2 Kg Of Ice At 20°C Is Mixed With 5 Kg Of Warer

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2 Kg Of Ice At 20°C Is Mixed With 5 Kg Of Warer

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Two Glass Bulbs Of Equal Volume Are Connected By A Narrow

Modified 262 Year Ago

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Two Glass Bulbs Of Equal Volume Are Connected By A Narrow

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Which Of The Following Is Not A Thermodynamic Coordinate?

Modified 17 Year Ago

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17 Year Ago

Which Of The Following Is Not A Thermodynamic Coordinate?

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Two Soap Bubbles Of Radii X And Y Coalesce To Constitute A Bubble Of Radius Z. Then, Z Is Equal To

Modified 17 Year Ago

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17 Year Ago

Two Soap Bubbles Of Radii X And Y Coalesce To Constitute A Bubble Of Radius Z. Then, Z Is Equal To

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The Shown P – V Diagram Represents The Thermodynamic Cycle Of An Engine, Operating With An Ideal Monoatomic Gas. The Amount Of Heat, Extracted From The Source In A Single Cycle Is

Modified 17 Year Ago

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17 Year Ago

The Shown P – V Diagram Represents The Thermodynamic Cycle Of An Engine, Operating With An Ideal Monoatomic Gas. The Amount Of Heat, Extracted From The Source In A Single Cycle Is

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0 Answer
281 views

A Graph Of Pressure Versus Volume For An Ideal Gas For Different Processes Is As Shown. In The Graph, Curve OC Represents

Modified 17 Year Ago

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17 Year Ago

A Graph Of Pressure Versus Volume For An Ideal Gas For Different Processes Is As Shown. In The Graph, Curve OC Represents

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280 views

Amount Of Heat Given To A System Is 35 J & The Amount Of Work Done On A System Is 15J,then Change In Its Internal Energy Would Be

Modified 250 Year Ago

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250 Year Ago

Amount Of Heat Given To A System Is 35 J & The Amount Of Work Done On A System Is 15J,then Change In Its Internal Energy Would Be

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