The phase change h2(g) → h2(s) is called and the enthalpy change, δh, for this phase change has a sign.

The phase change H₂(g) → H₂(s) is called deposition, and the enthalpy change, ΔH, for this phase change has a negative (-) sign.
Deposition is a thermodynamic process in which gas transforms into solid without passing through the liquid phase. Example is formin snow in clouds directly from water vapor. In deposition energy is released.

Answer is is darkly don’t but i want the points