A-LevelChemistryChemical energetics9701/12 · Feb/Mar 2023 · Q161 Mark
The table shows bond energies for some diatomic molecules. Deuterium, D, is an isotope of hydrogen. [Table with columns "bond", "energy /kJ mol⁻¹" and rows "F-F 158", "Cl-Cl 242", "Br-Br 193", "I-I 151", "H-H 436", "D-D 442"] 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 and chlorine can be calculated using these data alone.
A1 only
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct answer
A: 1 only
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Chemical energetics and see which topics are most likely to come up next.
Sign up free →