Hydrogen chloride gas and hydrogen iodide gas have different thermal stabilities. The difference is due to a difference in the energies of some of the covalent bonds that are involved in the decomposition.
Which row identities the more stable of the two compounds, and gives the correct explanation?
Identify of the more thermally stable compound | Explanation for the difference in stability | |
A | Hydrogen chloride | the Cl-Cl bond is stronger than the I-I bond |
B | Hydrogen chloride | the H-Cl bond is stronger than the H-I bond |
C | Hydrogen iodide | the Cl-Cl bond is stronger than the I-I bond |
D | Hydrogen iodide | the H-Cl bond is stronger than the H-I bond |