Energy change

• Endothermic reactions absorbs heat
• Exothermic releases heat
• Combustion is when a fuel is burned in oxygen to release energy.
• Displacement happens when a more reactive metal displaces a less reactive metal from its compound.
• Neutralisation happens when an acid is added to an alkali to form a salt and water
• Photosynthesis is an endothermic reaction
• Dehydration is an endothermic reaction
• Melting ice is an endothermic reaction