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The internal energy of a gas is given by...

The internal energy of a gas is given by `U=1.5pV`. It expands from `100cm^2` to `200cm^3` against a constant pressure of `1.0xx10^5Pa`. Calculate the heat absorbed by the gas in the process.

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When pressure is constant
`DeltaW=PDeltaV`
According to first law of thermodynamics
`DeltaQ=DeltaU+DeltaW=1.5PDeltaV+PDeltaV`
`=2.5PDeltaV=2.5P(V_2-V_1)`
`=2.5xx10^5(200-100)xx10^-6`
`=25J`
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CP SINGH-LAWS OF THERMODYNAMICS-EXERCISE
  1. The internal energy of a gas is given by U=1.5pV. It expands from 100c...

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  2. The first law of thermodynamics incorporates are concept (i) conserv...

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  3. The work done in the process AB is

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  4. (i) DeltaW(AB)=5P0V0 (ii) DeltaW(BC)=0 (iii) DeltaW(CA)=-2P0V0 (...

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  5. Consider the process on a system shown in figure. During the process, ...

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  6. Consider two processes on a system as shown in figure. The volumes in...

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  7. A system can be taken from the initial state p(1),V(1) to the final st...

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  8. In the figure given two processes A and B are shown by which a thermod...

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  9. Refer to figure in previous question, DeltaU(1) and DeltaU(2) be the c...

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  10. Refer to figure DeltaU(1) and DeltaU(2) be the changes in internal ene...

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  11. In a given process on an ideal gas, dW=0 and dQlt0. Then for the gas

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  12. Consider the following two statements. (A) If heat is added to a syst...

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  13. In a process on a system, the initial pressure and volume are equal to...

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  14. The pressure p and volume V of an ideal gas both increase in a process...

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  15. The state of a thermodynamic system is represented by

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  16. Which of the following is not a thermodynamical function

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  17. If Q, E and W denote respectively the heat added, change in internal e...

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  18. For free expansion of the gas, which of the following is true?

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  19. A system is given 300 calories of heat and it does 600 joules of work....

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  20. In thermodynamic process, pressure of a fixed mass of a gas is changes...

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  21. A perfect gas goes from a state A to another state B by absorbing 8 × ...

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