2 Handling data question 1
This question is about displacement reactions.
A student uses this method to investigate what happens when excess metal is added to a solution of copper(II) sulfate.
- pour some copper(II) sulfate solution into a polystyrene cup and record the temperature
- add excess metal W to the polystyrene cup and stir the mixture
- record the maximum temperature reached
- calculate the temperature increase of the solution
The student repeats the method for metals X, Y and Z.
For each metal, the student records three sets of results.
The table shows the student's results.
Calculate the mean temperature increase for metal Y.
Give your answer to two significant figures.
mean temperature increase =