A student investigated the heat energy change when different masses of anhydrous sodium carbonate (Na2CO3\text{Na}_2\text{CO}_3Na2CO3) were dissolved in 75 cm3 of distilled water.
The apparatus used is shown in Figure 1.
The student used the following method:
Step 1: Measure 75 cm3 of distilled water into the polystyrene cup. Step 2: Record the starting temperature of the water. Step 3: Add 3.5 g of anhydrous sodium carbonate, cover with the lid, and stir the mixture. Step 4: Record the maximum temperature reached. Step 5: Repeat the experiment using different masses of anhydrous sodium carbonate.
Name a piece of apparatus that should be used to measure the 75 cm3 of distilled water in Step 1.
Practise Edexcel GCSE Chemistry Heat energy changes in chemical reactions with exam-style questions for Foundation and Higher tier. 130 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
