5cChange of state

Syllabus objectives

• 5.8explain why heating a system will change the energy stored within the system and raise its temperature or produce changes of stateSeparate Physics only
• 5.9describe the changes that occur when a solid melts to form a liquid, and when a liquid evaporates or boils to form a gasSeparate Physics only
• 5.10describe the arrangement and motion of particles in solids, liquids and gasesSeparate Physics only
• 5.11practical: obtain a temperature–time graph to show the constant temperature during a change of stateSeparate Physics onlyPractical
• 5.12know 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)Separate Physics only
• 5.13use the equation: change in thermal energy = mass × specific heat capacity × change in temperature ΔQ = m × c × ΔTSeparate Physics only
• 5.14practical: investigate the specific heat capacity of materials including water and some solidsSeparate Physics onlyPractical