Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

Hydrogen reacts with ethene. The equation is given below. $\text{C}_2\text{H}_4 + \text{H}_2 \rightarrow \text{C}_2\text{H}_6$ The bond energies are listed. What is the energy change for this reaction?

  • A$-560\ \text{kJ mol}^{-1}$
  • B$-124\ \text{kJ mol}^{-1}$
  • C$+486\ \text{kJ mol}^{-1}$
  • D$+5496\ \text{kJ mol}^{-1}$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI