A student heats a block of paraffin wax in a beaker until it melts completely. The initial mass of the solid paraffin wax is 75textg75\\text{ g}75textg.
Write down the mass of the liquid wax produced.
Mass =** .................................... \75textg75\\text{ g}\\75textg **
Explain your answer to (a)(i).
............................................................................................................................................................
............................................................................................................................................................ [2]
Describe one difference between a physical change and a chemical change.
............................................................................................................................................................ [1]
A student does an experiment to find the difference between the specific heat capacities of vegetable oil and water.
The student places an identical heater and a thermometer into two beakers, C and D.
Look at the diagram.
There are 5 steps to the method for this experiment. Complete the missing steps for this method.
Step 1 – Put water into beaker C and vegetable oil into beaker D.
Step 2 – ............................................................................................................................................................
Step 3 – ............................................................................................................................................................
Step 4 – ............................................................................................................................................................
Step 5** – Calculate the temperature change of beaker C and beaker D. **
Suggest one mistake the student made when choosing or setting up their equipment.
............................................................................................................................................................ [1]
Suggest two improvements to the method followed.
1 ...........................................................................................................................................................
2** ............................................................................................................................................................ **