A-LEVEL CHEMISTRY
k
ASSESSMENT POINT 2 k k
PAPER 2 k
(TOPICS 11, 16, 17, 18 and 19)
k k k k k k
Answerkallk questionsk
Maxk 80k marks
Name ……………………………………………………………..
Mark ……../80 ……....% Gradek ………
1
Pagek 1k ofk 20
,1. Thek manufacturek ofk methanolk cank bek achievedk ink twok stages.
(a) Ink thek firstk stage,k methanek andk steamk reactk according∆tok thek
followingk equation.
CH4(g)k +k H2O(g) CO(g)k +k 3H2(g) Hοk =k +210k kJ
mol–1
Discuss,k withk reasons,k thek effectsk ofk increasingk separatelyk thek
temperaturek andk thek pressurek onk thek yieldk ofk thek productsk andk onk
thek ratek ofk thisk reaction.
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(6)
(Totalk 6k marks)
2. Synthesisk gask isk ak mixturek ofk carbonk monoxidek andk hydrogen.k Methanolk
cank bek manufacturedk fromk synthesisk gask ink ak reversiblek reactionk ask
shownk byk thek followingk equation.
CO(g)k +k 2H2(g) CH3OH(g) ΔHοk =k –91k kJk mol–1
(a) Ak samplek ofk synthesisk gask containingk 0.240k molk ofk carbonk
monoxidek andk 0.380k molk ofk hydrogenk wask sealedk togetherk withk
ak catalystk ink ak containerk ofk volumek 1.50k dm3.
Whenk equilibriumk wask establishedk atk temperaturek T1k thek
equilibriumk mixturek containedk 0.170k molk ofk carbonk monoxide.
Calculatek thek amount,k ink moles,k ofk methanolk andk thek amount,k ink
moles,k ofk hydrogenk ink thek equilibriumk mixture.
Methanolk ...............................................................................................
......
2
Pagek 2k ofk 20
, Hydrogenk ..............................................................................................
.......
(2)
3
Pagek 3k ofk 20
k
ASSESSMENT POINT 2 k k
PAPER 2 k
(TOPICS 11, 16, 17, 18 and 19)
k k k k k k
Answerkallk questionsk
Maxk 80k marks
Name ……………………………………………………………..
Mark ……../80 ……....% Gradek ………
1
Pagek 1k ofk 20
,1. Thek manufacturek ofk methanolk cank bek achievedk ink twok stages.
(a) Ink thek firstk stage,k methanek andk steamk reactk according∆tok thek
followingk equation.
CH4(g)k +k H2O(g) CO(g)k +k 3H2(g) Hοk =k +210k kJ
mol–1
Discuss,k withk reasons,k thek effectsk ofk increasingk separatelyk thek
temperaturek andk thek pressurek onk thek yieldk ofk thek productsk andk onk
thek ratek ofk thisk reaction.
...............................................................................................................
.......
...............................................................................................................
.......
...............................................................................................................
.......
...............................................................................................................
.......
...............................................................................................................
.......
...............................................................................................................
.......
(6)
(Totalk 6k marks)
2. Synthesisk gask isk ak mixturek ofk carbonk monoxidek andk hydrogen.k Methanolk
cank bek manufacturedk fromk synthesisk gask ink ak reversiblek reactionk ask
shownk byk thek followingk equation.
CO(g)k +k 2H2(g) CH3OH(g) ΔHοk =k –91k kJk mol–1
(a) Ak samplek ofk synthesisk gask containingk 0.240k molk ofk carbonk
monoxidek andk 0.380k molk ofk hydrogenk wask sealedk togetherk withk
ak catalystk ink ak containerk ofk volumek 1.50k dm3.
Whenk equilibriumk wask establishedk atk temperaturek T1k thek
equilibriumk mixturek containedk 0.170k molk ofk carbonk monoxide.
Calculatek thek amount,k ink moles,k ofk methanolk andk thek amount,k ink
moles,k ofk hydrogenk ink thek equilibriumk mixture.
Methanolk ...............................................................................................
......
2
Pagek 2k ofk 20
, Hydrogenk ..............................................................................................
.......
(2)
3
Pagek 3k ofk 20
