Why does sugar free jello melt faster than jello?

* Sugar acts as a stabilizer: Sugar helps the gelatin molecules form a stronger, more stable network. This network holds the water molecules in the Jello, making it firm.

* Sugar-free sweeteners are less effective: Sugar-free sweeteners don't have the same stabilizing effect as sugar. They might not be able to form as strong of a network, leading to a weaker gel.

Other factors influencing melting speed:

* Gelatin concentration: More gelatin means a firmer gel that will resist melting longer.

* Temperature: Higher temperatures will melt Jello faster.

* Exposure to air: Leaving Jello exposed to air can cause it to dry out and melt faster.

So, while sugar-free Jello might not be as firm as regular Jello, it actually holds up better to melting!