The diagram was messed up, the signs were all the opposite of what they should have been.

The signs for the enthalpy values in the original image contradict standard thermodynamic convention, which is confusing for learners. By convention, the sign of ΔH reflects the change within the system, not its effect on the surroundings.

Exothermic processes (like deposition and freezing), where the system releases energy, should have a negative ΔH.

Endothermic processes (like sublimation and melting), where the system absorbs energy, should have a positive ΔH.

The original image incorrectly shows exothermic processes with positive values. The linked YouTube video confirms the correct convention at timestamp 6:14, showing freezing and condensation with negative values. Correcting these signs will align the card with fundamental thermodynamic principles.