Question

According to kinetic theory of gases, monoatomic ideal gases have

• A. translational kinetic energy
• B. rotational kinetic energy
• C. vibrational kinetic energy
• D. all of the above

Answer 1

The correct option is A translational kinetic energy

Molecules of a monoatomic ideal gas (atoms) can only travel in a straight path between two points and don't have rotational/vibrational K.E. Whereas in a diatomic/polyatomic gas, molecules can vibrate/rotate about different axes.

Thus, monoatomic ideal gases have only translational kinetic energy.