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The work done by a weightless piston in ...

The work done by a weightless piston in causing an expansing `Delta V` (at constant temperature), when the opposing pressure P is variable, is given by :

A

`W = - int p Delta V`

B

W = 0

C

`W = -P Delta V`

D

None

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The correct Answer is:
A
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ALLEN-THERMODYNAMICS -EXERCISE -2
  1. Which one is a state function :-

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  2. Out of boiling point (I), entropy (II), pH (III) and e.m.f of a cell (...

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  3. The work done by a weightless piston in causing an expansing Delta V (...

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  4. The work done by 100 calorie of heat in isothermal expansion of ideal ...

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  5. Temperature and heat are not :-

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  6. One mole of a gas absorbs 200 J of heat at constant volume. Its temper...

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  7. q=-w is not true for :-

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  8. The temperature of an ideal gas increases in an:

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  9. Enthalpy of 1 mole monoatomic ideal gas is equals to :-

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  10. Which statement is true for reversible process :-

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  11. Both q & w are function & q + w is a function :-

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  12. If work done by the system is 300 joule when 100 cal. Heat is supplied...

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  13. A system has internal energy equal to U(1), 450J of heat is taken out ...

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  14. The work done by a system is 8J, when 40J heat is supplied to it. Calc...

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  15. If a gas absorbs 200J of heat and expands by 500 cm^(3) against a cons...

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  16. Identify the state quantiy among the following

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  17. Internal enregy change during a reversible is isothermal expansion of ...

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  18. Under which of the following conditions is the relation, Delta H = Del...

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  19. The difference heats of reaction at constant pressure and constant vol...

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  20. For a gaseous reaction, A(g)+3B(g)to3C(g)+3D(g),DeltaU is 17 kcal at 2...

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