Chemical Equilibrium

Chemical Equilibrium - / 0- Which of the following are...

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/ 0 - W hich o f the f o ll ow ing are con - ect for a r e acti o n at equil i briu m ? I . R eactants and product s k eep reacting. I I. Rate s of the forward and re v er s e r e actions change . III . C oncentrations of the reactan t s and products continue to c ha nge. I o nl y I and II I only I I and I I I o nl y 1 , II and I II T h . ~ 1 1 'l'b . ~ . . ' I V [B][ C ] e exp ressIO nl o r t e e qUlI num constant lor a reactIOnI S : . l\ . = ) [ A t K ~ [ 0 . < ] CO, ' t ) ~ CO . ' t~ l :: \ A t a ce r t a in temp e r a ture the values of [A] , [ B] a nd [C ] are all 0 . 2 m o l / L . W h a t happens t o t he va lu e o f K w hen all three va lue s are d o ubled to 0 . 4 m o l / L? C . I t d o ubles . D. I t i ncrease s b y a factor o f f o ur . f < - - : :: CO, ~ ) C £ i . \ : ~ 2NOCI(g ) ~ 2NO(g ) + C h( g ) :: \ .s L ~ 3 · C ~ \O :- [ NO ] L L \ l j f 2 . i A . ® It i s hal v ed. I t d o e s n o t change. 3. At 35 0 0 ° C , K = 3 .6 X 10 5 mol / L fo r t he re a cti o n: ~ hich relationship must be con - ect at equilibr i um? a) [ NO ] = [N OC l] G [ NO C l] < [Cb] b ) 2[ N O] ~ [ Cl, ] d ) [N O ] < [ N OCI] . . . C kJo t I ) L A " I f the eqU I lIb n um constant for an eqUIlIbnum s y st e m IS mcr eas ed by an 111cre a se 1 11 I f temper a t u re the n J. - ~ 1 r ' : '" \ r ; I h - 1 ~ k ' l -- p ~ , \ e ~ L f ' \ K ) S ~ .) ~ :3 A [react a nts] i ncre as es a nd [products] d ecr e ases Q ? 2 . ) [reactants] d e crease s and [products] i ncreases c ) [reactants] a nd [pr o ducts] decreases d ) [ r eactant s ] a nd [pr od ucts] increases 5 . For the follo w ing equation : 2 A ~ B ~ Ca lculate the equilibrium c o nstant if the s o lution w hich is orig i n a l l y on e m o lar ( 1 mol / L ) in pure B beco me s 0 . 50 molar in B at equilibrium. @ O . 50 O . S \
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~ ~ ; _ : U l ~ ·~ ~ ~ ~ \ f x . , .\ 2 . . 0 - : \ ' 0' £ ( . . v ' . ~ ~ . t J ) ct B .., ~< . : . ~ -t ~\v •. . •. \ } - ~ ~ k 7 Cl ~S LJ+ I L - / { I -- ( <J I 1 4 ~ , - J ~ · . } ~I fr e Jl The concentrations of HI, H 2 and 1 2 a r e de t ennined to be 0.2 M. 0.1 1\1 and 0.1 M, respecti v ely. The system: Q J f ' .. . - ; [ rs .~ ) ( oJ ~ needs to s hift right in order to establish equilibrium. ~ b) needs a catalyst in orde r to establish eq u ilibrium. C () , 2) c) is at equilibrium. d)
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This note was uploaded on 11/08/2011 for the course ECON 1B03 taught by Professor Hannahholmes during the Fall '08 term at McMaster University.

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Chemical Equilibrium - / 0- Which of the following are...

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