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The Van der Waal's equation accountś for...

The Van der Waal's equation accountś for: (1)The intermolecular forces only (2)The actual volume of the molecules only (3)Both the intermolecular forces and the molecular volume

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C
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Van der Waal's forces are attraction inter molecular forces. Write the names of any two types of van der Waal's forces.

Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP. Take the radius of an oxygen molecule to be 3 Å .

Knowledge Check

  • If the intermolecular forces vanish away, the volume occupied by the molecules contained 4.5kg water at STP will be

    A
    `5.6 m^3`
    B
    `4.5 m^3`
    C
    `11.2` litre
    D
    `11.2 m^2`

  • If the intermolecular forces vanish away, the volume occupied by the molecules contained in 4.5 kg water at STP will be:

    A
    `5.6 m^(3)`
    B
    `4.5 m^(3)`
    C
    11.2 litre
    D
    11.2 `m^(2)`

  • In Van der Waals equation for a non-ideal gas, the term which accounts for the intermolecular forces is: a/V^2 , b , RT , 1 /( R T)

    A
    aV^2'
    B
    b
    C
    RT
    D
    '1 /( R T)'

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    Write the name of van der Waal's force between Non-polar molecules.

    Assuming that the behaviour of ammonia is correctly described by the van der Waal's equation near the critical point, and knowing the critical molar volume of 0.72500 mol L^(-1) and critical temperature of 405.3 K, determine the critical pressure of ammonia.

    If a body is immersed in a fluid, it experiences an upward force called the buoyant force. The magnitude of buoyant force depends on (a) the size or volume of the body and (b) the density of the fluid. How large is this buoyant force? The answer to this question was discovered by the Greek Philosopher and mathematician Archimedes (287-212B.C) and is known as Archimedes Principle which states that ‘When a body is immersed wholly or partly in a fluid, it experiences an upthrust equal to the weight of the fluid displaced by it'. This principle holds for bodies of any shape and for fluids of even non-uniform density. The necessary condition for a body to float in a liquid is that the weight of the liquid displaced by the immersed portion of the body must be equal to the weight of the body. A cubical-block of density rho floats completely immersed in two non-mixing liquids of densities rho_1 and rho_2 as shown in Fig. The relation between rho, rho_1 and rho_2 is

    If a body is immersed in a fluid, it experiences an upward force called the buoyant force. The magnitude of buoyant force depends on (a) the size or volume of the body and (b) the density of the fluid. How large is this buoyant force? The answer to this question was discovered by the Greek Philosopher and mathematician Archimedes (287-212B.C) and is known as Archimedes Principle which states that ‘When a body is immersed wholly or partly in a fluid, it experiences an upthrust equal to the weight of the fluid displaced by it. This principle holds for bodies of any shape and for fluids of even non-uniform density. The necessary condition for a body to float in a liquid is that the weight of the liquid displaced by the immersed portion of the body must be equal to the weight of the body. A common hydrometer has a uniform stem graduated downwards from 0, 1, 2,.... upto 10. When floating in pure water it reads and in a liquid of relative density 1.5, it reads 10. What is the relative density of a liquid in which it reads 5?

    Assertion : van der Waals equation is applicable only to non-ideal gases. Reason : Ideal gases obey the equation PV=nRT .

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