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Stoichiometry

Q1:

Internal energy of a substance comprises of the __________ energy.

A vibrational

B rotational

C translational

D all (a), (b) & (c)

ANS:D - all (a), (b) & (c)

The internal energy of a substance comprises all of the following types of energy:

  1. Vibrational energy: This refers to the energy associated with the vibration of atoms or molecules within a substance. In solids, molecules vibrate about their equilibrium positions.
  2. Rotational energy: This refers to the energy associated with the rotation of molecules around their axes. In gases and liquids, molecules can rotate about their centers of mass.
  3. Translational energy: This refers to the energy associated with the movement of molecules through space. In gases, molecules move freely and randomly in all directions.
So, the correct answer is: all of the above—vibrational, rotational, and translational energy.



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