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.

Step-by-step 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=(3)/(2)kT`

where,

K = average kinetic energy

k = Boltzmann constant =
`1.3807* 10^(-23)J/K`

T = temperature (it is expressed in Kelvins)

So, the units of K will be:

`\text{Average kinetic energy}=(3)/(2)* (J/K)* (K)\\\\\text{Average kinetic energy}=J`

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