4.3.1 Changes of state and the particle model

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5 Terms

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What is density?

The mass per unit volume

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What is the equation for density?

Density = mass / volume

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Why do solids and liquids have similar densities?

The space between particles doesn’t change significantly

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Why do gases have a far lower density?

The spacing between atoms increase as the particles have lots of energy to move so volume increases greatly and density decreases

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Why are physical changes to a state not chemical?

They aren’t chemical because the material keeps its original properties when reversed