GCSE Edexcel Chemistry Measuring temperature change: A student investigated the tempe

Question

A student investigated the temperature change that took place when different salts were dissolved in water.

The student used the following method.

step 1 pour 50 cm³ of water into a polystyrene cup and record the temperature of the water

step 2 find the mass of an empty boiling tube

step 3 add 2 spatula measures of a salt to the boiling tube and find its new mass

step 4 add the salt to the water

step 5 stir the mixture and record the temperature after 2 minutes.

Figure 3 shows the apparatus used.

For steps 2 and 3, the student obtained the mass measurements shown in Figure 4 for the first salt.

mass of empty boiling tube in g 22.52
mass of boiling tube + 2 spatula measures of a salt in g 24.16

Use the mass measurements in Figure 4 to calculate the mass of salt, in grams, added to the water.

A student investigated the temperature change that took place when different salts were dissolved in water - Edexcel - GCSE Chemistry - Question 2 - 2023 - Paper 2