1) Particles vibrate around a fixed position in a) Solids b) Liquids c) Gases 2) The energy required to melt or freeze a substance is called a) Heat capacity b) Latent heat of fusion c) Latent heat of vaporisation 3) The unit for specific heat capacity a) J/Kg0C b) JKg0C c) kJ/g/0C 4) Internal energy is a measure of a) Kinetic energy and potential energy b) Chemical energy and elastic energy c) Electrostatic and kinetic energy 5) The energy required to evaporate or condense a substance is called a) Heat capacity b) Latent heat of fusion c) Latent heat of vaporisation 6) Gas particles move  a) Quickly in one direction b) A range of speeds in all directions c) Slowly in all directions 7) Gas pressure is affected by a) Temperature and particle size b) Temperature and volume

The particle model

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