( ( By definition ) ( , ( ( ( the ( molar heat ) ) ( of reaction ) ) ( ( is ( ( the heat ) ( ( ( given off ) or ) ( absorbed ( by ( ( the reaction ) ( expressed ( in ( units ( of ( kilojoules ( per ( mole ( of ( one ( of ( ( the reagents ) ( in ( the reaction ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN By) (NP (NN definition))) (, ,) (NP (NP (DT the) (NN molar) (NN heat)) (PP (IN of) (NP (NN reaction)))) (VP (VBZ is) (NP (NP (DT the) (NN heat)) (VP (VP (VBN given) (PRT (RP off))) (CC or) (VP (VBN absorbed) (PP (IN by) (NP (NP (DT the) (NN reaction)) (VP (VBN expressed) (PP (IN in) (NP (NP (NNS units)) (PP (IN of) (NP (NP (NNS kilojoules)) (PP (IN per) (NP (NP (NN mole)) (PP (IN of) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (NNS reagents)) (PP (IN in) (NP (DT the) (NN reaction)))))))))))))))))))) (. .)))
By definition, the molar heat of reaction is the heat given off or absorbed by the reaction expressed in units of kilojoules per mole of one of the reagents in the reaction.
(ROOT (S (NP (NNS Kilojoules)) (VP (VBP are) (ADVP (RB typically)) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NP (NNP heats)) (PP (IN of) (NP (NN reaction))))))))) (. .)))