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 source
is removed.
200°C
vaporization
150°C
melting
100°C
Temperature (°C)
water vapor
50°C
liquid water
0°C
ice
-50°C
10
20
50
60
70
30 40
Time (min)
A. The molecules will stop moving.
B. The molecules will begin moving more quickly.
C. The molecules will begin moving more slowly.
D. The motion will change very little.

Answer 1

Answer: C

Step-by-step explanation:

The molecules will begin to move more slowly when the heat source is removed. When the heat is off, the water will begin to cool. Molecules in liquid water move more slowly. The molecules require less space and are closer to each other. And in ice, the molecules contain the least amount of heat energy, so the movement is very slow.

Answer 2

the correct answer is B

Step-by-step explanation:

The kinetic model of the movement describes that the movement of the molecules increases with the increase of their internal energy, which in a macroscopic sample is reflected in an increase in the temperature of the sample.

The sample graph shows the function of temperature over time, which is why our kinetic model establishes that there is an increase in the movement of water molecules.

Consequently the correct answer is B