Question

Sayid recorded the temperatures of four substances in a chart.

A 2-column table with 4 rows. The first column labeled substance has entries W, X, Y, Z. The second column labeled Temperature (degrees Celsius) has entries 12, 18, 9, 20.

Which conclusion is best supported by the data?

The particles in substance W have a greater average kinetic energy than the particles in substance Z.
The particles in substance X have a greater average kinetic energy than the particles in substance Z.
The particles in substance W have a lower average kinetic energy than the particles in substance X.
The particles in substance Z have a lower average kinetic energy than the particles in substance Y.

Answer 1

The answer is C(3rd choice)

Step-by-step explanation:

Answer 2

The particles in substance W have a lower average kinetic energy than the particles in substance X.

Step-by-step explanation:

The temperatures of the substances in this problem are:

W X Y Z

12 18 9 20

(expressed in degrees Celsius)

The temperature of a substance is a measure of the average kinetic energy of the particles in the substance.

In fact, the two variables are related by the formula:

`KE=(3)/(2)kT`

where

KE is the average kinetic energy of the particles

k is the Boltzmann constant

T is the absolute temperature (in Kelvin) of the substance

Therefore, we see that the average kinetic energy of the particles is directly proportional to the temperature of the substance. So, the correct option is

The particles in substance W have a lower average kinetic energy than the particles in substance X.

Because substance W has a lower temperature (12 degrees) than substance X (18 degrees)