Power Words List 5

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Law of Conservation of Mass

Back

A principle stating that mass cannot be created or destroyed in a closed system through ordinary chemical reactions or physical transformations.

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Endothermic

Back

A process or reaction that absorbs energy in the form of heat.

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Exothermic

Back

A process or reaction that releases energy in the form of heat.

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Open system

Back

A system in which matter and energy can be exchanged with the surroundings.

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Closed system

Back

A system in which matter is not exchanged with the surroundings, though energy can be.

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Antoine Lavosier

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A French chemist known as the 'Father of Modern Chemistry' for his role in establishing the law of conservation of mass.

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Products

Back

Substances that are formed as the result of a chemical reaction.

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Reactants

Back

Substances that start a chemical reaction and are transformed into products.

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Yield

Back

The amount of product obtained in a chemical reaction.

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Catalyst

Back

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.