Topic 3 Flashcards
What’s the equation for density
Density = mass/ volume
How to find the density of a solid
Measure it’s mass.
For irregular solids use eureka cab filled with water
Water displaced transferred to measuring cylinder. Vol of water is cold of object
How to find the density of a liquid
Measuring cylinder on balance on zero. 10ml of liquid into measuring cylinder. Record the mass. Keep adding 10ml and take recordings. 1ml=1cm3
Avg density
What’s internal energy
Energy stored by particles that make up a system
What’s the the internal energy of a system
The total energy that it’s particles have in their kinetic and potential energy stores
What does heating the system do
Increases internal energy
What’s latent heat
Energy needed to change the state of a substance
What’s specific latent heat
The amount of energy needed to change 1kg of a substance from one state to another without changing its temperature
Why does a change in pressure cause a change in volume
If a container can change its size and shape easily then the pressure causes the container to compress or expand
Why does doing work on a gas increase it’s temp
Doing work increases internal energy increasing temp.
