Final answer:
The reaction between gaseous hydrogen and liquid bromine is a redox reaction, where hydrogen is oxidized and bromine is reduced.
Step-by-step explanation:
The reaction between gaseous hydrogen and liquid bromine is a redox reaction. Redox reactions involve the transfer of electrons between reactants. In this case, hydrogen is oxidized and bromine is reduced.
The balanced equation for the reaction between hydrogen gas and liquid bromine is:
H₂(g) + Br₂(l) → 2HBr(g)
In this reaction, hydrogen is oxidized from an oxidation state of 0 to +1, and bromine is reduced from an oxidation state of 0 to -1.