Question 104
Zara and Arun are carrying out an investigation into the heat given off when they add pieces of calcium to water. They both use 10 cm³ water and add pieces of calcium.
These are Zara’s results.
| Mass of calcium added in g | Start temperature in °C | Final temperature in °C | Temperature change in °C |
|---|---|---|---|
| 1 | 19 | 20 | … |
| 2 | 19 | 21 | … |
| 3 | 19 | 22 | … |
| 4 | 19 | 23 | … |
These are Arun’s results.
| Mass of calcium added in g | Start temperature in °C | Final temperature in °C | Temperature change in °C |
|---|---|---|---|
| 1 | 21 | 22 | … |
| 2 | 21 | 22 | … |
| 3 | 21 | 24 | … |
| 4 | 21 | 25 | … |
Zara and Arun carried out a third set of experiments, using 20 cm³ water instead of 10 cm³. Could they use these results to add to the first two sets, to calculate the mean temperature change? Explain your answer. [2]
These are Zara’s results.
| Mass of calcium added in g | Start temperature in °C | Final temperature in °C | Temperature change in °C |
|---|---|---|---|
| 1 | 19 | 20 | … |
| 2 | 19 | 21 | … |
| 3 | 19 | 22 | … |
| 4 | 19 | 23 | … |
These are Arun’s results.
| Mass of calcium added in g | Start temperature in °C | Final temperature in °C | Temperature change in °C |
|---|---|---|---|
| 1 | 21 | 22 | … |
| 2 | 21 | 22 | … |
| 3 | 21 | 24 | … |
| 4 | 21 | 25 | … |
Zara and Arun carried out a third set of experiments, using 20 cm³ water instead of 10 cm³. Could they use these results to add to the first two sets, to calculate the mean temperature change? Explain your answer. [2]
