CHANGES OF STATE AND SPECIFIC LATENT HEAT AND INTERNAL ENERGY

What is specific latent heat

the amount of energy required to change the state on one kg of a substance with no change in temperature

Word equation of specific latent heat

specific latent heat = energy for a change of state / mass

Equation of specific latent heat

L = E/m

Energy unit, measurement and symbol

J, joules, E

Mass unit, measurement and symbol

kg, kilograms, m

Specific latent heat unit, measurement and symbol

J/kg, joules per kilogram, L

What is specific latent heat of fusion

change of state from solid to liquid

What is specific latent heat of vaporisation

change of state from liquid to vapour

What is internal energy

total kinetic energy and potential energy of all the particles that make up a system

How does heating change the energy stored

increasing the energy of the particles in the system, raising temperature or a change in state

When substances change state what happens

mass is always conserved

What are changes of state

physical changes because the material recovers it original properties if change is reserved

Why do gases have a lower density than solids

the spacing between atoms increases as the bonds have broken therefore volume increases and density decreases