Paper 1 October/November 2008 CHEMISTRY (9701/01) IGCSE

The table shows bond energies for some diatomic molecules. Deuterium, D, is an isotope of
hydrogen.
Which statements are correct?
1 Diatomic molecules have exact values for their bond energies, which are always
positive.
2 The trend in Group 7 bond energies can be explained by the variation in instantaneous
dipole–induced dipole (id–id) forces.
3 A value for the enthalpy change for the reaction between deuterium…