Chemistry · Oct / Nov 2018 · Paper 11 · Question 15

The equation represents the reaction between two gases, X2 and Y2, to form compound XY. X2(g) + Y2(g) → 2XY(g) The energy profile diagram for the reaction is shown. [energy profile diagram] Which statement about this reaction is correct?

1. AThe activation energy for the reaction is equal to E.
2. BThe enthalpy change for the reaction is equal to E.
3. CThe reaction is exothermic.
4. DThe total energy needed to break bonds is greater than the total energy needed to form bonds.

As printed in the paper