Density - the mass of 1cm3 or 1m3 of substance, Sublimation - a solid turning directly into s gas, Condensation - a gas becoming a liquid, Evaporation - loss of high energy molecules from the surface of a liquid, Vapourisation - a liquid becoming a gas, Conservation of Mass - the total mass during a process is constant, Physical Change - one which can be reversed, Latent Heat - involved in a change of state, Internal Energy - the total of the ke and pe possessed by the particles in a substance, Pressure - the force acting on unit area, Specific Latent Heat of Fusion - the energy required to completely convert 1kg of a solid at its melting point to liquid, without change in temperature, Specific Latent Heat of VaVapourisation - the energy required to completely convert 1kg of a liquid at its boiling point to gas, without change in temperatureo liquid, without change in temperature,

P6 Molecules and Matter

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