Responses to Heat

States of Matter 

There are three states of matter:

• solid
• liquid
• gas

Changes of State

• Melting - to become from liquid to solid
• Evaporation - to change from liquid to gas
• Freezing - to change from liquid to solid
• Condensation - to change from gas to liquid
• Sublimation - when a solid becomes a gas without becoming a liquid and vice versa

Solids, Liquids, Gases

Latent Heat

• Latent heat is the amount of energy absorbed or released by a chemical substance during a change of state
• No change of temperature occurs during this transition
• When a solid melts, latent heat absorbs energy to break bonds and disrupt arrangment of particles
• When freezing, latent heat releases energy to bond particles together

Freezing Point Depression

• salt can be used as a freezing point depressant
• it lowers melting point of ice so it melts faster and it makes it more difficult to freeze again

Diffusion

• diffusion is the movement of gas particles from an area of high concentration to an area of low concentration

Solubility Vocabulary

• solvent - liquid that does the dissolving
• solute - the stuff that gets dissolved
• solution - solvent and solute together
• soluble - if something can dissolve it is called 'soluble'
• insoluble - if something cannot dissolve it is called 'insoluble'
• suspension - when insoluble stuff is…