The Collaborative International Dictionary
Condensable
Condensable \Con*den"sa*ble\, a. [Cf. F. condensable.] Capable of being condensed; as, vapor is condensable.
Wiktionary
condensable
a. That is able to be condensed; that can undergo condensation
Usage examples of "condensable".
Proof would be finding a highly volatile liquid or a condensable gas in solution in the swamp water.