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For free expansion of a gas which of the...

For free expansion of a gas which of the following is true?

A

`Q = W gt 0` and `Delta E_("int") =0`

B

`Q=0, W gt 0` and `Delta E_("int") = - W`

C

`W = 0 , Q gt 0` and `Delta E_("int") = Q`

D

`W = 0 , Q lt ` and `DeltaE_("int") = 0`

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-THERMODYNAMICS-ADDITIONAL PRACTICE EXERCISE (LEVEL - I (MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS)
  1. For free expansion of a gas which of the following is true?

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  2. A gas under constant pressure of 4.5 xx 10^5 Pa when subjected to 800...

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  3. If for hydrogen Cp-Cv = m and for nitrogen Cp -Cv= n , where Cp and Cv...

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  4. If gamma be the ratio of specific heats of a perfect heals of a perfe...

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  5. In an adiabatic change, the pressure P and temperature T of a diatomic...

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  6. If for a gas ( R)/(Cv) =0.67, the gas is made of molecules which are

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  7. For a gas, the difference between two specific heats is 5000 "J/mole-"...

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  8. One mole of an ideal gas at an initial temperature of TK does 6R joule...

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  9. An ideal gas with pressure P, volume V and temperature T is expanded i...

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  10. Entropy of a thermodynamic system does not change when this system is ...

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  11. In a P-V diagram for an ideal gas (where P is along the y-axis and V i...

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  12. Internal energy of n1 moles of hydrogen at temperature T is equal to ...

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  13. In carnot engine efficiency is 40% at hot reservoir temperature T. For...

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  14. A container having 1 mole of a gas at a temperature 27^@C has a movab...

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  15. An ideal gas is found to obey pV^(3/2) = constant during an adiabatic ...

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  16. By opening the door of a refrigerator inside a closed room:

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  17. During the melting of a slab of ice at 273 K at atmospheric pressure:

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  18. Which of the following parameters does not characterise the thermodyna...

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  19. An ideal gas has molar specific heat 5R/2 at constant pressure. If 300...

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  20. Consider the following statement. The internal energy of an ideal mono...

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