Kinetic Molecular Theory of Gases
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Questions and Answers

What is the total number of degrees of freedom for a diatomic molecule that can rotate and vibrate?

  • 8
  • 7 (correct)
  • 6
  • 5

    • What is the shape of the velocity distribution curve for a gas at a particular temperature?

  • Linear
  • Uniform
  • Parabolic
  • Maxima at most probable speed (correct)

    • What is the effect of temperature on the kinetic energy per molecule of a gas?

  • It increases with increase in temperature (correct)
  • It remains constant with temperature
  • It decreases with increase in temperature
  • It depends on the mass of the molecule

    • What is the number of independent motions possible for a monoatomic gas molecule?

    <p>3</p> Signup and view all the answers

    What is the number of degrees of freedom for a triatomic non-linear molecule?

    <p>6</p> Signup and view all the answers

    What is the degree of freedom for an atom in a solid?

    <p>6 for vibration</p> Signup and view all the answers

    What is the relation between the molar specific heat at constant pressure (C_P) and that at constant volume (C_V)?

    <p>C_P &gt; C_V</p> Signup and view all the answers

    What is the ratio of rms, average, and most probable velocities in a gas?

    <p>3 : 2.5 : 2</p> Signup and view all the answers

    What is the value of γ (gamma) for a monoatomic gas?

    <p>1.6</p> Signup and view all the answers

    What is the characteristic of the specific heat of a gas?

    <p>It is always more than 1</p> Signup and view all the answers

    What is the total number of degrees of freedom of a polyatomic molecule?

    <p>6 + fvib</p> Signup and view all the answers

    What happens to the pressure of a saturated vapour when the volume is changed at constant temperature?

    <p>It remains constant</p> Signup and view all the answers

    Which of the following statements is true for a diatomic gas?

    <p>It behaves as a monoatomic gas at very low temperature</p> Signup and view all the answers

    What is the effect of increasing the number of molecules in a gas at constant temperature?

    <p>The kinetic energy and pressure increase</p> Signup and view all the answers

    What is the correct expression for the effective volume of a real gas?

    <p>V - b</p> Signup and view all the answers

    What is the change in momentum of the wall A when a molecule collides with it?

    <p>2mvx</p> Signup and view all the answers

    What is the critical pressure of O2?

    <p>49.7 atm</p> Signup and view all the answers

    What is the relation between the critical temperature, critical pressure, and critical volume of a gas?

    <p>Vc = 3b</p> Signup and view all the answers

    What is the force exerted by a single molecule on the wall?

    <p>2mvx / Δt</p> Signup and view all the answers

    What is the velocity of a molecule in terms of its components?

    <p>v = √(vx^2 + vy^2 + vz^2)</p> Signup and view all the answers

    What is the relation between the pressure of an ideal gas and the mean kinetic energy of translation per unit volume of the gas?

    <p>The pressure is numerically equal to two thirds of the mean kinetic energy of translation per unit volume of the gas</p> Signup and view all the answers

    What happens to the pressure of a gas when the mass of the gas is increased at constant volume and temperature?

    <p>The pressure increases</p> Signup and view all the answers

    What is the relation between the pressure of a gas and the root mean square velocity of the gas molecules?

    <p>The pressure is proportional to the square of the root mean square velocity</p> Signup and view all the answers

    What happens to the pressure of a gas when the temperature of the gas is increased at constant volume?

    <p>The pressure increases</p> Signup and view all the answers

    What is the relation between the pressure of a gas and the velocity of the gas molecules?

    <p>The pressure is proportional to the square of the velocity of the gas molecules</p> Signup and view all the answers

    What is the relation between the rate of diffusion of a gas and its density?

    <p>The rate of diffusion is inversely proportional to the square root of the density of the gas</p> Signup and view all the answers

    What is the graphical representation of Gay-Lussac's law?

    <p>A straight line with a positive slope</p> Signup and view all the answers

    What is the total pressure exerted by a mixture of non-reacting gases occupying a vessel?

    <p>The sum of the individual pressures of each gas</p> Signup and view all the answers

    What is the relation between the volume and temperature of a gas at constant pressure?

    <p>The volume increases with an increase in temperature</p> Signup and view all the answers

    What is the formula for the relation between the rate of diffusion of two gases?

    <p>r1/r2 = √(M2/M1)</p> Signup and view all the answers

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