Chemistry 5070 · O Level · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

The reaction between nitrogen and oxygen is shown below. $\text{N}_2(\text{g}) + 2\text{O}_2(\text{g}) \rightarrow 2\text{NO}_2(\text{g})$ For the reaction shown, the enthalpy change is $+66\,\text{kJ}$. If two moles of nitrogen and two moles of oxygen are used, what is the enthalpy change?

  • A$+16.5\,\text{kJ}$
  • B$+33\,\text{kJ}$
  • C$+66\,\text{kJ}$
  • D$+132\,\text{kJ}$

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