A technician is choosing a solid to dissolve in water to make a cooling bath. She dissolves a weighed sample of each of four solids, J, K, L and M, in $cm350\,\mathrm{cm^{3}}$ of water in a polystyrene cup and records the temperature change. Every sample dissolves completely.

Solid	Mass of solid (g)	Temperature change ( $∘C^\circ\mathrm{C}$ )
J	5.0	-6.5
K	8.0	-12.0
L	4.0	+5.2
M	12.0	-16.8

Which conclusion about the results is correct?

Solid J gives a bigger temperature decrease per gram than solid K.

Solid M gives the biggest temperature decrease per gram of the four solids.

Solid K gives a bigger temperature decrease per gram than solid M.

Solid L takes in energy from the surroundings as it dissolves.

Solid	Mass of solid (g)	Temperature change ( $∘C^\circ\mathrm{C}$ )
J	5.0	-6.5
K	8.0	-12.0
L	4.0	+5.2
M	12.0	-16.8

Which conclusion about the results is correct?

Solid J gives a bigger temperature decrease per gram than solid K.

Solid M gives the biggest temperature decrease per gram of the four solids.

Solid K gives a bigger temperature decrease per gram than solid M.

Solid L takes in energy from the surroundings as it dissolves.

3.2 Energetics

Question 33

Markscheme

3.2 Energetics

Question 33

Markscheme

3.2 Energetics

Question 33

3.2 Energetics Questions

3.2 Energetics

Question 33

3.2 Energetics Questions