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What are the two main characteristics of...

What are the two main characteristics of an ideal gas ?

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(i) The size of its molecules is negligibly small.
(ii) Force of attraction//repulsion between the molecules is zero.
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Knowledge Check

  • For an ideal gas :

    A
    the change in internal energy in a constant pressure process from temperature `T_1 toT_2` is equal to `nC_v(T_2-T_1),` where `C_v` is the molar specific heat at constant volume and n the number of moles of the gas.
    B
    the change in internal energy of the gas and the work done by the gas are equal in magnitude in an adiabatic process.
    C
    the internal energy does not change in an isothermal process.
    D
    no heat is added or removed in an adiabatic process.

  • For an ideal gas :

    A
    The change in internal energy in a constant pressure process form temperatures `T_(1)` and `T_(2)` is equal to `nC_(v) (T_(2) - T_(1))` where `C_(v)` is the molar heat capacity at constant volume and n is the number of moles of the gas
    B
    The change in internal energy and the work done by the gas are equal in magnitude in an adiabatic process
    C
    The internal energy does not change in isothernal process
    D
    no heat is added or removed in an adiabatic process

  • For an ideal gas,

    A
    the change m internal energy in a constant pressure process from temperature `T_1` to `T_2` is equal to, `nC_v(T_2-T_1)`, where `C_v` is the molar specific heat at constant volume and n is the number of moles of the gas
    B
    the change in internal energy of the gas is equal to the work done by the gas in magnitude in an adiabatic process.
    C
    The internal energy shows no change in an isothermal process
    D
    All of options A, B and C
    • PRADEEP-BEHAVIOUR OF PERFECT GAS & KINETIC THEORY-Short answer questions
    1. What are the two main characteristics of an ideal gas ?

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    2. For an ideal gas, interval energy can only be translational K.E. Why ?

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    3. What is the average velocity of the molecules of an ideal gas ?

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    4. On driving the scooter for a long time, the air pressure in the tyres ...

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    5. Isothermal curves for a given mass of gas are shown at two different t...

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    6. Explain the rise of temperature on heating on the basis of kinetic the...

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    7. The pressure of a given mass of a gas is halved at constant temperatur...

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    8. Two gases A and B each at temperature T. Pressure P and volume V, are ...

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    9. Two vessels of the same volume and filled with the same gas at the sam...

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    10. The volume of vessel A is twice the volume of another vessel B and bot...

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    11. On which of the following factors does the average kinetic energy of g...

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    12. A gas in a vessel is at the pressure P(0). If the masses of all the mo...

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    13. The absolute temperatue of a gas is made four times. How many times wi...

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    14. If a molecule of krypton is 2.25 times heavier than a molecule of hydr...

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    15. Two gases each at temperature T, volume V and pressure P are mixed suc...

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    16. Cooking gas cylinders are kept in a lorry moving with uniform speed. W...

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    17. Kinetic energy of translation of molecules of a gas having volume V an...

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    18. Under what condition of pressure and temperature, a gas can be assumed...

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    19. What is an ideal gas ? Explain its main characteristics.

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    20. Using the law of equipartition of energy , detemine the values of Cp, ...

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