( ( ( ( ( Heat ( ( ( ( ( ( does flow ) ( from ( the ( hot plate ) ) ) ) , ) ( through ( the flask ) ) ) , ) ( to ( the system ) ) ) ) , ) so ) ( there ( is ( ( an exchange ) ( of energy ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Heat)) (VP (VBZ does) (NP (NN flow)) (PP (IN from) (NP (DT the) (JJ hot) (NN plate))) (, ,) (PP (IN through) (NP (DT the) (NN flask))) (, ,) (PP (TO to) (NP (DT the) (NN system))))) (, ,) (IN so) (S (NP (EX there)) (VP (VBZ is) (NP (NP (DT an) (NN exchange)) (PP (IN of) (NP (NN energy)))))) (. .)))
Heat does flow from the hot plate, through the flask, to the system, so there is an exchange of energy.
(ROOT (S (NP (DT A) (JJ sealed) (, ,) (JJ vacuum-insulated) (NN reaction) (NN flask)) (VP (VBZ approximates) (NP (NP (DT the) (NN condition)) (PP (IN of) (NP (NP (DT a) (VBN isolated) (NN system)) (, ,) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CC neither) (NP (NN matter)) (CC nor) (NP (NN heat))) (VP (MD can) (VP (VB be) (VP (VBN exchanged) (PP (IN between) (NP (NN system) (CC and) (NNS surroundings)))))))))))) (. .)))
A sealed, vacuum-insulated reaction flask approximates the condition of a isolated system, in which neither matter nor heat can be exchanged between system and surroundings.