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10.15b - Enthalpies of … • • • • F o r m a tio n...

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Unformatted text preview: Enthalpies of … • • • • F o r m a tio n C o m b u s tio n H y d r o g e n a tio n R e a c tio n ( g e n e r a l) R e la te to th e p r o c e s s ! More Isomers M e th y l c y c lo p e n ta n e C y c lo h e x a n e E th y l c y c lo b u ta n e Isothermal Titration Calorimetry “ r e a c tio n” = m o le c u le s a s s o c ia tin g 1 Isothermal Titration Calorimetry H e a t r e le a s e d ( o r ta k e n in ) M o r e h e a t a t fir s t ( w h y ? ) F ig u r e o u t Δ H , a ls o p r o b a b ility o f “ r e a c tio n ” ( a s s o c ia tio n ) I m p o r t a n t f o r d r u g d e s i g n , e t c… “ r e a c tio n” = m o le c u le s a s s o c ia tin g Consequences of Energy Use • C o m b u s tio n o f F o s s il F u e ls S u n lig h t in R a d ia tio n o u t T ~ 2 5 5 K ( c o ld !) G re e n h o u s e e ffe c t M akes T ~ 288 K CO2 d u e to h u m a n s Additional Sources • • • • • Sun W in d T id e s N u c le a r B io d ie s e l ( s u n v ia p h o to s y n th e s is ) Is s u e o f e n e r g y c o n v e r s io n , b y - p r o d u c ts , s to r a g e tr a n s p o r ta tio n , e tc … 2 Potential Energy = Stored Energy • W h y d o e s a p e n d ro p ? • W h y d o e s h y d ro g e n b u rn ? • W h y d o e s ic e m e lt? T e m p e r a tu r e = d is tr ib u te d r a n d o m m o tio n ~ h e a t ( 2 n d L a w , la te N o v .) 3 ...
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