What is the difference between total kinetic energy and translational kinetic energy ? For what type of molecules, the two are equal ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Total Kinetic Energy (TKE):**
Total Kinetic Energy is the sum of all forms of kinetic energy present in a system. It includes:
- **Translational Kinetic Energy (TKE):** Energy due to the movement of the center of mass of the molecules.
- **Rotational Kinetic Energy (RKE):** Energy due to the rotation of molecules around their axes.
- **Vibrational Kinetic Energy (VKE):** Energy due to the vibrations of the atoms within the molecules.

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