Section 7 - Matter

Question 1

What is specific heat capacity?

Answer 1

energy required to raise one kilogram (kg) of the material by one degree Celsius (°C).

Question 2

What is specific latent heat?

Answer 2

The energy required / released to change 1kg of a particular substance from one state to another, without changing its temperature

Required = heating, released = cooling

Question 3

Specific latent heat of vapourisation

Answer 3

Energy change when a substance changes between a liquid and a gas

Evaporating / condensing

Question 4

Specific latent heat of fusion

Answer 4

Energy change when a substance changes between a solid and a liquid

Question 5

What is elastic deformation?

Answer 5

When an object returns to its original state once the force is removed

Question 6

What is inelastic deformation?

Or plastic deformation

Answer 6

When a force is applied to an object, removed and then the object does not return to its original state - becomes deformed

Question 7

What is the spring constant?

Answer 7

How many newtons it would take to strech the object by 1m

higher SP = stiffer material

Question 8

What is hooke’s law

Answer 8

Force and extension are directly proportional
-> till the elastic limit / limit of proportionality

Question 9

what happens when an object reaches its elastic limit?

Answer 9

It will start deforming inelastically