Chapter 17, Problem 66A

To determine

Atom having greater kinetic energy.

Answer to Problem 66A

Carbon atom has more kinetic energy.

Explanation of Solution

Given:

The atoms are, Hydrogen atom and carbon atom.

The speed of both the atoms are same.

Formula Used:

The kinetic energy is given as,

  $KE=\frac{1}{2}m{v}^2$

Where, $m$ is mass and $v$ is velocity.

Calculation:

The atomic mass of hydrogen atom is 1 amu and

The atomic mass of carbon atom is 12 amu.

Since speed of both atoms are same.

So, kinetic energy will be directly proportional to the mass of the atoms.

That is, $KE\propto m$

As carbon atom is having grater mass than hydrogen atom.

So, kinetic energy of carbon atom will be more.

Conclusion:

Therefore, the kinetic energy of carbon atom is more.