What's the plural form of exergonicity? Here's the word you're looking for.
Answer
The noun exergonicity can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be exergonicity.
However, in more specific contexts, the plural form can also be exergonicities e.g. in reference to various types of exergonicities
or a collection of exergonicities.