(b(iii))[1]
The beaker is made from a special type of glass. Suggest why it is appropriate for this experiment.
(b(iv))[1]
Calculate the specific heat capacity $c_m$ of the $50\,\text{g}$ mass from the equation: $c_m = \dfrac{4.2(\theta_2 - \theta_1)}{2(100 - \theta_2)}$. Give your answer in $\text{J}/(\text{g}\,^{\circ}\text{C})$.
(c(i))[2]
Describe two sources of error that could arise in the method used to determine $c_m$.
(c(ii))[2]
Suggest two ways to improve the method.