Energy Revision

Outcomes Revise density and changes of state Revise what internal energy means in relation to changes of state. Revise Specific latent heat and gas pressure

PARTICLE PHYSICS 80 76 78 Density Describe the definition of density Write down the equation for density How do you measure the density of a solid and a liquid? States of matter Draw the diagram for the different changes in state Why do solids have a fixed shape and volume? Why can liquids flow? Why is the density of gases low? Changes of state What is a melting point? What is a freezing point? Describe in terms of temperature, how ice melts. 86 84 82 Internal energy What is internal energy? What happens to internal energy if a substance is heated? Specific latent heat What is specific latent heat of fusion? What is specific latent heat of vaporisation? How do we calculate specific latent heat? Gas pressure What happens to pressure of a gas if in a sealed container at a high temperature? What will the gas particles do in the container? What happens if the container is cooled quickly?