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Is the excluded volume of a real gas equ...

Is the excluded volume of a real gas equal to the actual E volume of the molecules of a gas ?

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No, the excluded volume of a real gas is four times the actual volume of the molecules.
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In a mixture of gases, the volume content of a gas is 0.06% at STP. Calculate the number of molecules of the gas in 1 L of the mixture.

The main reason for deviation of gases from ideal behaviour is few assumptions of kinetic theory . These are (i) there is no force of attraction between the molecules of a gas (ii) volume of the molecules of a gas is negligibly small in comparison to the volume of the gas (iii) particles of a gas are always in constant random motion .

The gas law which relates the volume of a gas to moles of the gas is:

Ideal gas equation is represented as PV=nRT . Gases present in universe were fond ideal in the Boyle's temperature range only and deviated more from ideal gas behavior at high pressure and low temperature. The deviation are explained in term of compressibility factor z . For ideal behavior Z=(PV)/(nRT)=1 . the main cause to show deviavtion were due to wrong assumptions made about forces oif attractions (which becomes significant at high pressure ) and volume V occupied by molecules in PV=nRT is supposed to be volume of gas or the volume of container in which gas is placed by assuming that gaseous molecules do not have appreciable volume. Actually volume of the gas is that volume in which each molecule of gas can move freely. If volume occupied by gaseous molecule is not negligible, then the term V would be replaced by the ideal volume which by available for free motion of each molecule of gas in 1 mole gas. V_("actual")= volume of container -volume occupied by molecules =v-b Where b represent the excluded volume occupied by molecules present in one mole of gas. Similarly for n mole gas V_("actual")=v-nb The ratio of coefficient of thermal expansion alpha=(((delV)/(delT))_(P))/V and the isothermal compressibility beta=-((delV)/(delP)_(T)) for an ideal gas is:

The numerical value of b is ......times the actual volume occupied by one mole of gas molecule.

If pressure and temperature of an ideal gas are doubled and volume is halved, the number of molecules of the gas

ICSE-STATES OF MATTER : GASES AND LIQUIDS-VERY SHORT ANSWER TYPE QUESTIONS
  1. Name the three physical states of matter.

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  2. Can a substance exist in all the three states of matter? Give an examp...

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  3. What is the relation between mass and number of moles of a gas?

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  4. Define the term volume of an object.

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  5. Express one atm pressure in terms of the height of mercury column.

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  6. What is the SI unit of pressure ? Define it.

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  7. State the relation between atm, Nm, Pa, torr and bar.

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  8. Name the apparatus used for the measurement of the pressure of a gas.

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  9. What do you understand by S.T.P. ?

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  10. What is the shape of the curve obtained on plotting P against PV at co...

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  11. Which law is signified by the relation V1/T1 = V2/T2 ?

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  12. Name the scientist who introduced absolute scale of temperature.

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  13. What is the general unit of gas constant R?

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  14. What happens when a jar full of H2 gas is placed inverted over a jar ...

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  15. State the following : Absolute temperature of a gas at 7^@C.

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  16. How are the different types of velocities of a gas molecules related w...

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  17. Define compressibility factor of a gas.

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  18. Is the excluded volume of a real gas equal to the actual E volume of t...

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  19. State and explain the pressure-temperature law.

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  20. The pressure of a real gas is less than the pressure of an ideal gas b...

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