216. If 50 mL of 0/6 mol NaOH solution is mixed with 150 mL of 0/1 mol $\text{H}_2\text{SO}_4$ solution at $25^\circ\text{C}$ inside a calorimeter, and the temperature at the end of the reaction reaches $30^\circ\text{C}$, $\Delta H$ of the reaction: $$2\text{NaOH}(\text{aq}) + \text{H}_2\text{SO}_4(\text{aq}) \rightarrow \text{Na}_2\text{SO}_4(\text{aq}) + 2\text{H}_2\text{O}(\text{l})$$ is approximately how many kilojoules? (Assume the heat of the reaction is only used to raise the temperature of the water, and $c_p = 4/2\ \text{J.g}^{-1}.^\circ\text{C}^{-1}$ for all solutions. Assume density $1\ \text{g.mL}^{-1}$.) (1) $+150$ (2) $-150$ (3) $+785$ (4) $-785$ \begin{flushright} Calculation space \end{flushright} %% Page 22 Chemistry120-CPage 21
\textbf{216.} If 50 mL of 0/6 mol NaOH solution is mixed with 150 mL of 0/1 mol $\text{H}_2\text{SO}_4$ solution at $25^\circ\text{C}$ inside a calorimeter, and the temperature at the end of the reaction reaches $30^\circ\text{C}$, $\Delta H$ of the reaction:
$$2\text{NaOH}(\text{aq}) + \text{H}_2\text{SO}_4(\text{aq}) \rightarrow \text{Na}_2\text{SO}_4(\text{aq}) + 2\text{H}_2\text{O}(\text{l})$$
is approximately how many kilojoules? (Assume the heat of the reaction is only used to raise the temperature of the water, and $c_p = 4/2\ \text{J.g}^{-1}.^\circ\text{C}^{-1}$ for all solutions. Assume density $1\ \text{g.mL}^{-1}$.)
\begin{center}
(1) $+150$ \qquad (2) $-150$ \qquad (3) $+785$ \qquad (4) $-785$
\end{center}
\begin{flushright}
\textit{Calculation space}
\end{flushright}
%% Page 22
\textbf{Chemistry} \hfill \textbf{120-C} \hfill \textbf{Page 21}
\medskip