Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

The enthalpy change for the neutralisation shown below is $-114\ \text{kJ mol}^{-1}$. $\text{2NaOH (aq)} + \text{H}_2\text{SO}_4\text{ (aq)} \rightarrow \text{Na}_2\text{SO}_4\text{ (aq)} + \text{2H}_2\text{O (l)}$. Using this information, what value is most likely for the enthalpy change of the following neutralisation? $\text{Ba(OH)}_2\text{ (aq)} + \text{2HCl (aq)} \rightarrow \text{BaCl}_2\text{ (aq)} + \text{2H}_2\text{O (l)}$

  • A$-57\ \text{kJ mol}^{-1}$
  • B$-76\ \text{kJ mol}^{-1}$
  • C$-114\ \text{kJ mol}^{-1}$
  • D$-228\ \text{kJ mol}^{-1}$

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