Changes in States

Melting: 

• Solid → liquid 
• Increase in energy
• Absorb energy
• Endothermic process

Freezing:

• Liquid → solid
• Decrease in energy 
• Released energy
• Exothermic process

Boiling:

• Liquid → gas
• Increase in energy 
• Absorbed energy 
• Endothermic process

Evaporation: 

• Liquid → gas
• Increase in energy
• Absorbed energy
• Endothermic process

Sublimation: 

• Solid → gas 
• Increase in energy
• Absorbed energy
• Endothermic energy 

Condensation:

• Gas → liquid 
• Decrease in energy 
• Release energy 
• Exothermic energy

Deposition:

• Gas → solid

• Decrease in energy

• Release energy

• Exothermic energy 

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Endothermic

• Energy increases

• Absorbs energy

• Getting hotter

• Surrounding colder

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Exothermic

• Energy decreases
• Releases energy 
• Getting colder
• Surrounding hotter