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(c) Change of state

Explain why heating a system will change the energy stored within the system and raise its temperature or produce changes of state

Describe the changes that occur when a solid melts to form a liquid, and when a liquid evaporates or boils to form a gas

Describe the arrangement and motion of particles in solids, liquids and gases

Practical: obtain a temperature–time graph to show the constant temperature during a change of state

Know that specific heat capacity is the energy required to change the temperature of an object by one degree Celsius per kilogram of mass (J/kg °C)

Use change in thermal energy = mass × specific heat capacity × change in temperature, ΔQ = mcΔT.

Practical: investigate the specific heat capacity of materials including water and some solids

Objective notes

7 learning objectives

58P Heating and energy storesExplain why heating a system will change the energy stored within the system and raise its temperature or produce changes of stateView 59P Melting, evaporation and boilingDescribe the changes that occur when a solid melts to form a liquid, and when a liquid evaporates or boils to form a gasView 510P Particle arrangement and motionDescribe the arrangement and motion of particles in solids, liquids and gasesView 511P Change of state practicalPractical: obtain a temperature–time graph to show the constant temperature during a change of stateView 512P Specific heat capacityKnow that specific heat capacity is the energy required to change the temperature of an object by one degree Celsius per kilogram of mass (J/kg °C)View513P Thermal energy equationUse change in thermal energy = mass × specific heat capacity × change in temperature, ΔQ = mcΔT.View 514P Specific heat capacity practicalPractical: investigate the specific heat capacity of materials including water and some solidsView

ConceptIGCSE Physics