Chemical Reactions

Flashcards about exothermic and endothermic reactions, combustion, oxides, and catalysts

Endothermic Reactions

Reactions that absorb heat and feel cold.

Exothermic Reactions

Reactions that release heat and feel hot.

Examples of Endothermic Reactions

Photosynthesis and thermal decomposition

Examples of Exothermic Reactions

Respiration, neutralization, and burning fuels

Three things needed for burning to take place

Oxygen, heat, and fuel

Examples of fuels

Petrol, coal, paper, wood, gas.

Complete Combustion

When there is plenty of oxygen available for a chemical to burn.

Incomplete Combustion

When oxygen is limited when a chemical burns (e.g., carbon burns to make carbon monoxide).

Oxide

Metal + oxygen (e.g., magnesium + oxygen -> magnesium oxide)

Monoxide

Non-metal + limited oxygen (e.g., carbon + limited oxygen -> carbon monoxide)

Dioxide

Non-metal + oxygen (e.g., carbon + oxygen -> carbon dioxide)

Fuels

Substances that release a lot of energy when burnt.

Catalyst

A substance that speeds up a chemical reaction but remains unchanged at the end.