( ( When ( ( ( the temperature ) ( of ( ( a gas ) ( at ( constant volume ) ) ) ) ) ( is increased ) ) ) ( , ( ( ( the pressure ) ( of ( the gas ) ) ) ( increases . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (NP (DT a) (NN gas)) (PP (IN at) (NP (JJ constant) (NN volume)))))) (VP (VBZ is) (VP (VBN increased))))) (, ,) (NP (NP (DT the) (NN pressure)) (PP (IN of) (NP (DT the) (NN gas)))) (VP (VBZ increases)) (. .)))
When the temperature of a gas at constant volume is increased, the pressure of the gas increases.
(ROOT (S (PP (IN From) (NP (NP (NNS observations)) (ADJP (RB as) (JJ simple) (PP (IN as) (S (VP (VBG blowing) (PRT (RP up)) (NP (DT a) (NN balloon)))))))) (, ,) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ clear)) (SBAR (IN that) (S (S (VP (VBG increasing) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN gas)))))) (VP (VBZ increases) (NP (DT the) (NN volume)))))) (. .)))