Question 1
FA student heats a solid substance X with a heater that transfers energy at a steady rate.
The Figure shows how the temperature of substance X changes with time.
Figure
a.[1]
Use the Figure to state the melting point of substance X.
b.[1]
Describe what is happening to substance X between 4 minutes and 10 minutes.
c.[2]
Energy is still being transferred to substance X between 4 minutes and 10 minutes, but its temperature does not change.
Explain why.
d.[2]
The student repeats the experiment with a larger mass of substance X and the same heater.
Describe two ways the graph would be different from the graph in the Figure.
1.2 Changes of state Questions
44 exam-style questions on OCR GCSE Physics 1.2 Changes of state, covering 1.2.1 Conservation of mass during changes of state, 1.2.2 Physical and chemical changes, 1.2.3 Heating, temperature and changes of state, 1.2.4 Specific heat capacity and specific latent heat, 1.2.5 Internal energy and temperature change, and 1.2.6 Energy transfer during a change of state. Each one has a worked solution and a mark scheme showing where the marks go.