A student cools a sample of liquid coconut oil in a container until it solidifies completely. The initial mass of the liquid coconut oil is 140 g140\text{ g}140 g.
Write down the mass of the solid coconut oil produced.
Mass =** .................................... g\text{g}g **
Explain your answer to (a)(i).
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Describe one difference between a physical change and a chemical change.
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A student does an experiment to find the difference between the specific heat capacities of ethanol and brine (saltwater).
The student places an identical electric immersion heater and a thermometer into two glass beakers, A and B.
Look at the diagram.
There are 5 steps to the method for this experiment. Complete the missing steps for this method.
Step 1 – Pour ethanol into beaker A and brine into beaker B.
Step 2 – ............................................................................................................................................................
Step 3 – ............................................................................................................................................................
Step 4 – ............................................................................................................................................................
Step 5** – Calculate the temperature change of the liquid in beaker A and beaker B. **
Suggest one mistake the student made when choosing or setting up their equipment.
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Suggest two improvements to the method followed.
1 ...........................................................................................................................................................
2** ............................................................................................................................................................ **