PMoM

Question 1

What is the equation for density?

Answer 1

Density = Mass/Volume

Question 2

Describe what happens to the particles of a solid as it is heated

Answer 2

The particles gain kinetic energy but they are not free to move so they vibrate

Question 3

What is internal energy?

Answer 3

Internal energy is the total of the kinetic energy (movement) + the potential energy (how far apart the particles are)

Question 4

Explain what is happening to the thermal energy that is supplied to a substance when its temperature is NOT increasing?

Answer 4

It is being used to change the state of the substance and increase the potential energy by breaking intermolecular bonds.

Question 5

If the air pressure inside a balloon increases, what happens to the volume of the balloon?

Answer 5

The pressure increases meaning there are more collisions with the
inside of the balloon, exiting more force on the balloon.
This will cause the balloon to expand (volume increases)

Question 6

Explain how to calculate the density of an irregularly shaped solid

Answer 6

Weigh the object to find the mass. Put the object in a measuring tube full of water and see how much water it displaces to find out the volume. Then divide the mass by the volume to figure out the density.