Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

Nitrogen trifluoride, $\text{NF}_3$, is employed in the production of some kinds of solar panels. The equation for the formation of nitrogen trifluoride is shown: $\text{N}_2 + 3\text{F}_2 \rightarrow 2\text{NF}_3$. Using the table of bond energies, what energy change does this reaction have?

  • A$-560\ \text{kJ mol}^{-1}$
  • B$-280\ \text{kJ mol}^{-1}$
  • C$+280\ \text{kJ mol}^{-1}$
  • D$+3080\ \text{kJ mol}^{-1}$

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