Hydrogen Iodide Can Theoretically Be Made by the Reaction of Hydrogen

Short Answer

Hydrogen iodide can theoretically be made by the reaction of hydrogen gas and iodine by the following reaction:
H₂(g)  I₂(s)  2HI(g)
What temperature conditions are required for the formation of HI to be favored at standard pressure?
S (H₂, g)  130.6 J/(mol  K)
S (I₂, s)  116.1 J/(mol  K)
S (HI, g)  206.6 J/(mol  K) (HI, g)  26.5 kJ/mol