Given that I have absolutely zero formal (or informal) education in chemistry (sorry about that), I'm struggling to get my head around what appears to be repeated confusions of the term "heat of solution" with regards positive vs. negative. As a specific example, the Wikipedia entry on Erythritol states:
Erythritol has a strong cooling effect (endothermic, or positive heat of solution) when it dissolves in water
However, many other sources, including a number I found via Google Books suggest that Erythritol has a negative heat of solution. For example, this table extract from Food Science, an Ecological Approach:
Erythritol: Noncaloric (0.2 kcal/g), high digestive tolerance, zero glycemic index, does not promote tooth decay, good heat and acid stability, high negative heat of solution.
This is frustrating as I'm trying to find something that has the opposite heat of solution to counteract erythritol's cooling effect, but since many sources seem to contradict each other, I'm struggling to find what I'm looking for.
Which is correct? Or am I using ambiguous terminology?