States of Matter and Gas Laws Part 2

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What happens to gas density when temperature decreases?

Back

When temperature decreases, the density of a gas increases because the gas particles move closer together.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion. In gases, it relates to the speed of the particles; higher temperatures mean higher kinetic energy.

Front

What is an endothermic change?

Back

An endothermic change is a process that absorbs heat from the surroundings, such as melting or evaporation.

Front

What is an exothermic change?

Back

An exothermic change is a process that releases heat to the surroundings, such as freezing or condensation.

Front

How does heating a gas affect its pressure?

Back

Heating a gas increases its pressure if the volume is constant, as the particles move faster and collide more frequently with the walls of the container.

Front

What is the relationship between temperature and particle movement in gases?

Back

As temperature increases, the movement of gas particles increases, leading to higher kinetic energy.

Front

What is the effect of pressure on the volume of a gas?

Back

According to Boyle's Law, if the pressure of a gas increases, its volume decreases, provided the temperature remains constant.

Front

What is the principle behind the expansion of gases when heated?

Back

When gases are heated, the particles gain kinetic energy, move faster, and spread apart, causing the gas to expand.

Front

What is the significance of the gas laws?

Back

Gas laws describe the relationships between pressure, volume, and temperature of gases, helping to predict their behavior under different conditions.