Internal energy

Question 1

What is the temperature of ‘Absolute zero’ ?

Answer 1

-273.15°c

Question 2

What happens at ‘Absolute zero’ ?

Answer 2

Particles/atoms have no kinetic energy and do not move at all.

Question 3

What is internal energy?

Answer 3

The total kinetic and potential energy of all the particles in the system.

Question 4

Why do particles in solids, liquids and gasses all move?

Answer 4

They all have kinetic energy

Question 5

What does potential energy do in particles?

Answer 5

This opposes forces attracting them together so therefore keeps particles seperated.

Question 6

Which particles are furthest apart?

Answer 6

Gas particles

Question 7

What increases internal energy?

Answer 7

Increasing the temperature

Question 8

What happens when gas particles crash into each other?

Answer 8

They exert force

Question 9

What happens when the particles get faster and collide more?

Answer 9

Increase in net force and gas pressure

Question 10

What does increasing temperature do?

Answer 10

• Increase the speed, number of collisions so does the pressure
• Changes state