P6-Molecules And Matter

Question 1

Why does the temperature of a substance not increase if it’s changing state

Answer 1

The energy that you are providing is being used to weaken or break bonds holding particles together rather than increasing the particles internal energy

Question 2

What is the definition of Specific latent heat

Answer 2

The energy required to change 1kg of a particular substance from one state to another without changing it’s temperature

Question 3

What are the two specific latent heats

Answer 3

Specific latent heat of fusion and vaporisation

Question 4

What is the meaning of specific latent heat of Vaporisation

Answer 4

Energy change when a substance changes between a liquid+gas

Question 5

What is the meaning of specific latent heat of fusion

Answer 5

Energy change when a substance changes between a solid+liquid

Question 6

When a substance is being cooled what is the differebce in what specific latent heat is

Answer 6

It isn’t the energy required to break bondsit’s the energy released when bonds are formed

Question 7

What is the equation for specific latent heat

Answer 7

Energy=massXspecific latent heat