GCSE / O Levels Chemistry

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.
E
energy reactants
products
progress of reaction
Which statement about this reaction is correct?
A The activation energy for the reaction is equal to E.
B The enthalpy change for the reaction is equal to E.
C The reaction is exothermic.
D The total energy needed to break bonds is greater than the total energy needed to form
bonds.


Reaction Pathway diagrams, Sulfuric Acid | 2018 - O/N - 5070/11 | Q15