Question

What unit would you use if you were measuring the average kinetic energy of a substance?

Answer 1

I believe the answer is joules

Answer 2

Answer: The units used to express average kinetic energy of a substance is Joules.

Explanation:

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system.

To calculate the average kinetic energy of the atom, we use the equation:

$K=\frac{3}{2}kT$

where,

K = average kinetic energy

k = Boltzmann constant = $1.3807\times 10^{-23}J/K$

T = temperature (it is expressed in Kelvins)

So, the units of K will be:

$\text{Average kinetic energy}=\frac{3}{2}\times (J/K)\times (K)\\\\\text{Average kinetic energy}=J$

Hence, the units used to express average kinetic energy of a substance is Joules.