Solució: \begin{align} E= m·Ce·(T1-T0) &\cssId{Step1}{}\\[3px] &\cssId{Step2}{p=m/V}\\[3px] &\cssId{Step3}{m=p·V}\\[3px] &\cssId{Step4}{Nota:~La~densitat~de~l'aigua~és~de~1kg/L} \\[3px] \end{align}