A block of paraffin wax is heated until it melts completely. The liquid wax is then placed in a sealed container and heated further until it completely vaporises.
What happens to the total mass of the wax during these changes of state?
Melting: decreases; vaporisation: increases
Melting: stays constant; vaporisation: stays constant
Melting: increases; vaporisation: decreases
Melting: stays constant; vaporisation: decreases
44 exam-style questions on CIE IGCSE Physics 2.1.1 States of matter and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.