Particle Model of Matter Flashcards
What happens to the density of a material if its compressed.
The density would increase because the particles are closer together (the mass wouldn’t change but the volume would decrease).
What is internal energy?
The energy stored by the particles that make up a system.
What is specific latent heat?
The amount of energy needed to change the state of 1kg of a substance without changing its temperature.
Why do colliding gas particles create pressure?
When gas particles collide with something they exert a force on it. In a sealed container, the outward gas pressure is the total force exerted by all of the particles in the gas on a unit area of the container walls. Faster particles and more frequent collisions both lead to an increase in net force, and so gas pressure. Increasing temperature will increase the speed, and so the pressure (if volume is kept constant). Pressure and volume are inversely proportional.
Explain how doing work on a gas can increase its temperature.
If you transfer energy by applying a force, then you do work. Doing work on a gas increases its internal energy, which can increase its temperature.
