Which change must result in an increase in the average kinetic energy of the molecules of a sample of N2(.g.) ?

Question

Which change must result in an increase in the average kinetic energy of the molecules of a sample of N2(.g.) ? (A) The pressure changes from 0.5 atmosphere to 1 atm (B) The volume changes from 1 L to 2 L (C) The temperature changes from 20° C to 30° C (D) The density changes from 2.0 g/L to 2.5 g/L

Tardigrade Admin · Accepted Answer

Average K.E. per mol =(3/2)RT propto T So, a temperature increases causes the molecules to more faster and this results in a higher average kinetic energy.

Q. Which change must result in an increase in the average kinetic energy of the molecules of a sample of $N_{2} (g)$ ?

The pressure changes from 0.5 atmosphere to 1 atm

The volume changes from 1 L to 2 L

The temperature changes from $2 0^{\circ} C$ to $3 0^{\circ}$ C

The density changes from 2.0 g/L to 2.5 g/L

Average K.E. per mol $= \frac{3}{2} RT \propto T$

So, a temperature increases causes the molecules to more faster and this results in a higher average kinetic energy.

Q. Which change must result in an increase in the average kinetic energy of the molecules of a sample of N2​(g) ?