State every measurement the student makes to obtain these values.
Why is a metal beaker chosen instead of a glass beaker?
Suggest two reasons why the temperature rise of the water was lower than the theoretical value.
Suggest two ways, using $1.0\,\text{g}$ of ethanol and $200\,\text{cm}^3$ of water, in which the apparatus can be modified to produce a temperature rise of more than $20\,^{\circ}\text{C}$.
Calculate the number of moles of ethanol in $1.0\,\text{g}$. The relative formula mass of ethanol, $\text{C}_2\text{H}_5\text{OH}$, is $46$.
What evidence in the table shows that all the reactions are exothermic?
Plot the data in the table on the grid. Draw a straight line of best fit. Extend your line to the left-hand side of the grid.
Use your graph to predict the temperature rise for methanol.
Explain why it is not possible to obtain a temperature rise of $90\,^{\circ}\text{C}$.
Suggest one way the student can obtain a temperature rise of $90\,^{\circ}\text{C}$.