Albert Teen YOU ARE LEARNING:  Temperature and Effect on Motion of Molecules  # Temperature and Effect on Motion of Molecules ### Temperature and Effect on Motion of Molecules

Temperature is a measure of how much internal energy a substance has. A high temperature means the particles have more kinetic energy and are vibrating/moving around more quickly. This will also increase the pressure.

True or false? Temperature is a type of energy. True or false? Heat is a kind of energy. If you increase the temperature of a substance, will the particles have more energy or less energy? Given that an increase in temperature gives the particles of a substance more energy, what do you think will happen to the motion of the particles? If you increase the temperature of a substance, you are giving the particles more energy in the form of thermal energy. This energy is transferred to kinetic energy which the particles use to move faster.

If the particles of a gas are given more energy, will they collide with the walls of a container more or less? If you increase the temperature of a gas, what effect will this have on the pressure the gas exerts on the container? If you increase the temperature of a gas and give the particles more energy, **** there will be more collisions with the walls of the container which will result in a higher pressure.

What would happen to the number of collisions if we reduced the temperature of a gas? So would a decrease in temperature result in an increase or decrease in gas pressure? Absolute Zero

1

If cooling a substance down reduces the amount of energy the particles in it have, what would happen if it was cooled down enough so that the particles stopped moving altogether? 2

The temperature at which the particles of a substance would stop vibrating altogether is known as absolute zero, and is $-273^{\circ} Celsius$ or $0^{\circ} Kelvin$.

Scientists have never achieved this temperature, but have come very close - **** $100 pK$ or 100 trillionths of a degree above absolute 0!