Home
Class 11
PHYSICS
Diatomic molecules like hydrogen have en...

Diatomic molecules like hydrogen have energies due to both translational as well as rotational motion. From the equation in kinetic theory PV = 2/3 E,E is the total energy per unit volume

Text Solution

Verified by Experts

According to kinetic theory equation, PV = 2/3 E [where P= Pressure V = volume] E is representing only translational part of energy. Internal energy contains all types of energies like translational, rotational, vibrational etc. But the molecules of an ideal gas is treated as point masses in kinetic theory, so its kinetic energy is only due to translational motion. Point mass does not have rotational or vibrational motion. Here, we assumed that the walls only exert perpendicular forces on molecules. They do not exert any parallel force, hence there will not be any type of rotation present. The wall produces only change in translational motion.
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (SHORT ANSWER QUESTIONS - 1 (2 MARKS))|20 Videos

  • KINEMATICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (NUMERICAL QUESTIONS)|42 Videos

  • KINEMATICS

    FULL MARKS|Exercise TEXTUAL QUESTIONS SOLVED (LONG ANSWER QUESTIONS)|14 Videos

  • HEAT AND THERMODYNAMICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (Numerical Problems)|16 Videos

  • KINETIC THEORY OF GASES

    FULL MARKS|Exercise Addtional Numerical Problems|10 Videos

Similar Questions

Explore conceptually related problems

The ratio of rotational kinetic energy to the total kinetic energy of a diatomic molecule is :

Calculate the dimensional formula of energy from the equation E= 1/2 mv^2 .

The plates of a parallel plate capacitor have an area of 90 cm^(2) each and are separated by 2.5mm. The capacitor is charged by connecting it to a 400V supply. a. How much electrostatic energy is stored by the capacitor? b. View this energy as stored in hte electrostatic field between the plates, and obtain the energy per unit volume u. Hence arrive at a relation between u and the magnitude of electric field E between the plates.

When a photon is emitted from an atom , the atom recils The kinetic energy of recoils and the energy of the photon come from the difference in energy between the state involved in the transition suppose a hydrogen atom change its state from n = 3 to n = 2 calculate the fractional change in the wavelength of light emitted , due to the recoil

Suppose the energy of a hydrogen- like atom is given as E_(n) = (-54.4)/(n^(2))eV where ninN . Calculate the following: (a) Sketch the energy levels for this atom and compute its atomic number. (b) If the atom is in ground state, compute its first excitation potential and also its ionization potential. (c) When a photon with energy 42 eV and another photon with energy 56 eV are made to collide with this atom, does this atom absorb these photons? (d) Determine the radius of its first Bohr orbit. (e) Calculate the kinetic and potential energies in the ground state.

In a simple harmonic motion, when the displacement it one- half of the amplitude, what fraction of the total energy (E) is kinetic ?

Take a small stone. Hold it in your hand. We know that the force gravity due to the earth acts on each and every object. When we were holding the stone in our hand, the stone was experiencing this force, but it was balanced by a force that we were applying on it in the opposite direction. As a result, the stone remained at rest. Once we release the stone from our hands the only force that acts on it is the gravitational force of the earth and the stone falls down under its influence. Whenever an object moves under the influence of the force of gravity alone, it is said to be falling freely. Thus the released stone is in a free fall. In free fall, the initial velocity of the object is zero and goes on increasing due to acceleration due to gravity of the earth. During free fall, the frictional force due to air opposes the motion of the object and a buoyant force also acts on the object. Thus, true free fall is possible only in vacuum. For a freely falling object, the velocity on reaching the earth and the time taken for it can be calculated by using Newton's equations of motion. For free fall the initial velocity u=0 and the acceleration a=g . Thus, we can write the equations as v="gt",s=1/2"gt"^(2),v^(2)=2gs For calculating the motion of an object thrown upwards, acceleration is negative, i.e. in a direction opposite to the velocity and is taken to be -g. The magnitude of g is the same but the velocity of the object decreases due to -ve acceleration. The moon and the artificial satellites are moving only under the influence of the gravitational field of the earth. Thus they are in free fall. Which force acts on the stone in free fall after you release it?

Take a small stone. Hold it in your hand. We know that the force gravity due to the earth acts on each and every object. When we were holding the stone in our hand, the stone was experiencing this force, but it was balanced by a force that we were applying on it in the opposite direction. As a result, the stone remained at rest. Once we release the stone from our hands the only force that acts on it is the gravitational force of the earth and the stone falls down under its influence. Whenever an object moves under the influence of the force of gravity alone, it is said to be falling freely. Thus the released stone is in a free fall. In free fall, the initial velocity of the object is zero and goes on increasing due to acceleration due to gravity of the earth. During free fall, the frictional force due to air opposes the motion of the object and buoyant force also acts on the object. Thus, true free fall is possible only in vacuum. For a freely falling object, the velocity on reaching the earth and the time taken for it can be calculated by using Newton's equations of motion. For free fall the initial velocity u=0 and the acceleration a=g . Thus, we can write the equations as v="gt",s=1/2"gt"^(2),v^(2)=2gs For calculating the motion of an object thrown upwards, acceleration is negative, i.e. in a direction opposite to the velocity and is taken to be -g. The magnitude of g is the same but the velocity of the object decreases due to -ve acceleration. The moon and the artificial satellites are moving only under the influence of the gravitational field of the earth. Thus they are in free fall. What is the initial velocity and what is the effect of gravitational acceleration on the object in free fall?

FULL MARKS-KINEMATICS-ADDITIONAL QUESTIONS SOLVED (I.MULTIPLE CHOICE)
  1. What does the area under acceleration-time graph represent for any giv...

    Text Solution

    |

  2. A meter long narrow bore held horizontally (and closed at one end) con...

    Text Solution

    |

  3. Diatomic molecules like hydrogen have energies due to both translation...

    Text Solution

    |

  4. for oxygen molecule with three angstrom value find the molecular volum...

    Text Solution

    |

  5. y=-kx^(2) is represented by

    Text Solution

    |

  6. Xprop(1)/(y) (or) XY= constant is represented by

    Text Solution

    |

  7. y=-e^(-kx) is represented by

    Text Solution

    |

  8. Y=1-e^(-kx) is represented by

    Text Solution

    |

  9. (x^(2))/(a^(2))+(y^(2))/(b^(2))=1 is represented by

    Text Solution

    |

  10. Let y=f(x) is a function . Its maximal (or) minimal can be obtained by

    Text Solution

    |

  11. A particle at rest starts moving in a horizontal straight line with un...

    Text Solution

    |

  12. The distance travelled by a body, falling freely from rest in t=1s, t=...

    Text Solution

    |

  13. The displacement of the particle along a straight line at time t is gi...

    Text Solution

    |

  14. Two bullets are fired at an angle of theta and ( 90 - theta ) to the h...

    Text Solution

    |

  15. A particle moves along a circular path under the action of a force. Th...

    Text Solution

    |

  16. For a particle, revolving in a circle with speed, the acceleration of ...

    Text Solution

    |

  17. A gun fires two bullets with same velocity at 60^(@) and 30^(@) with h...

    Text Solution

    |

  18. A ball is thrown vertically upward at a speed of 10 m/s. When it has r...

    Text Solution

    |

  19. A car moves from X to Y with a uniform speed V(u) and returns to Y wit...

    Text Solution

    |

  20. Two projectiles of same mass and with same velocity are thrown at an a...

    Text Solution

    |