Question

This mathematical model describes the changes that occur in a sample of

water as its temperature increases. Use this model to predict what will
happen to the motion of the molecules in a sample of water if the heat sour
is removed.
source
Temperature (°C)
200°C
150°C-
100°C-
50°C-
0°C-
-50°C
melling
10 20
vaporization
water vapor
liquid water
ice
30
40
Time (min)
50 60 70
OA. The molecules will begin moving more slowly.
OB. The molecules will begin moving more quickly.
OC. The motion will change very little.
OD. The molecules will stop moving.

Answer 1

A. The molecules will begin moving more slowly.

Step-by-step explanation:

In the given model, the temperature of water is shown on the x-axis, and the state of water (melting, vaporization, liquid water, ice) is shown on the y-axis. The model illustrates how the state of water changes as its temperature increases or decreases.

As the temperature of water increases, the molecules gain more energy, and their motion becomes more vigorous. This is represented by the transition from ice to liquid water to water vapor as the temperature rises from -50°C to 200°C.

Now, let's focus on what happens when the heat source is removed and the temperature of the water starts to decrease. As the water cools down, the molecules lose energy, resulting in a decrease in their motion.

Based on our understanding of how temperature affects molecular motion, we can conclude that if the heat source is removed and the temperature decreases, the molecules in the water will begin moving more slowly. This is because the decrease in temperature leads to a decrease in the kinetic energy of the molecules, resulting in reduced motion.

Therefore, the correct answer is:

A. The molecules will begin moving more slowly.

This aligns with our understanding of the relationship between temperature and molecular motion in a sample of water.

Hope this helps!