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particle model (changes of state (mass is conserved during changes of sate…
particle model
changes of state
mass is conserved during changes of sate e.g. is 20g of liquid evaporates, gas produced will weigh 20g
liquid to evaporating, liquid to solid freezing
solid to liquid melting, solid to gas sublimation
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these are physical changes so are reversible - not chemical changes as material retains its original properties
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heating a system
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the system could be an ice cube, a gas etc
specific heat capacity
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practical
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insert heater into iron block and start stopwatch once heater connects to power pack (note the power)
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