( ( When ( it ( reached ( the surface ) ) ) ) ( it ( quickly ( ( evaporated ( but ( by ( doing ( so ( it ( ( cooled ( the water ) ) ( in ( the jar ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (PRP it)) (VP (VBD reached) (NP (DT the) (NN surface))))) (NP (PRP it)) (ADVP (RB quickly)) (VP (VBD evaporated) (PP (CC but) (PP (IN by) (S (VP (VBG doing) (SBAR (IN so) (S (NP (PRP it)) (VP (VBD cooled) (NP (DT the) (NN water)) (PP (IN in) (NP (DT the) (NN jar))))))))))) (. .)))
When it reached the surface it quickly evaporated but by doing so it cooled the water in the jar.
(ROOT (S (NP (NP (DT The) (NN impact)) (PP (IN of) (NP (NP (JJ evaporative) (NN loss)) (PP (IN of) (NP (NP (DT the) (ADJP (RBS most) (JJ energetic)) (NN water) (NNS molecules)) (PP (IN from) (NP (DT a) (NN surface)))))))) (VP (VBZ has) (NP (NP (DT the) (NN impact)) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ cools) (NP (PRP it))))))) (. .)))
The impact of evaporative loss of the most energetic water molecules from a surface has the impact that it cools it.