Question

The correct order of thermal stability of hydrogen halides (\[H - X\]) is:
A.\[HI > HBr > HCl > HF\]
B.\[HF > HCl > HBr > HI\]
C.\[HCl > HF > HBr > HI\]
D.\[HI > HCl > HF > HBr\]

Answer 1

Hint: We know that the thermal stability of a bond is defined by the amount of energy or rate necessary to break it. Bond strength refers to how atoms are joined or bonded to one another, as well as the amount of energy necessary to break that bond.

Complete Step by Step Solution:
Thermal stability, as we all know, is frequently influenced by temperature, which refers to breaking chemical bonds in any chemical compound by an electric current. Hydrogen halide is a chemical made up of hydrogen and halogen. The thermal stability of hydrogen halides diminishes as the bond strength of the hydrogen halides falls as the group in the periodic table moves downward. One of the diatomic inorganic chemicals is hydrogen halides.

Hydrohalic acids are made up of hydrogen halides that are often gaseous in nature and react with water to produce an acid. As a result, the correct order of hydrogen halide thermal stability is \[HF > HCl > HBr > HI\] . This is due to the fact that hydrogen and fluorine have similar sizes, making them more stable and capable of holding electron pairs, however as we travel down the group, the size of the central atom grows larger, making the connection between the central atom and hydrogen less stable.

Therefore, the correct answer is option B \[HF > HCl > HBr > HI\] .

Note: The bond dissociation enthalpy is another quantity that can be defined by thermal stability. This enthalpy represents the amount of energy required to break the bonds in compounds. As a result, lower-temperature compounds require less energy to break bonds and vice versa.