Particle Model of Matter Topic

These flashcards cover key concepts related to the particle model of matter, states of matter, density calculations, internal energy, and properties of gases.

What is the formula for calculating density?

Density (p) = mass (m) ÷ volume (V)

How do you measure the density of an irregularly shaped object?

Measure the mass using a balance, displace water in a eureka can, and measure the volume of water displaced.

What occurs to gas pressure if the temperature of the gas is increased?

The pressure will increase due to higher kinetic energy of the gas particles.

What do particles have when they vibrate or move around in a system?

Kinetic energy and potential energy stores.

What is specific latent heat?

The amount of energy needed to change 1kg of a substance from one state to another without changing the temperature.

What happens during melting and boiling concerning internal energy?

Energy is absorbed to break bonds, increasing internal energy without a temperature increase.

What is conserved during a change of state?

Mass is conserved; the number of particles does not change.

What happens to pressure when the volume of a gas container is increased?

The pressure decreases due to a decrease in collision frequency.

What is the equation that describes the relationship between pressure and volume for a fixed mass at constant temperature?

P × V = constant.

How does work done on a gas affect its internal energy?

It causes the gas to gain internal energy, increasing its temperature.