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Name
Period
_
Chemical Kinetics Refresher Worksheet
TWe c.,..A~
u,.;
1.
(a) What is meant by the teon reaction rate?
IN CON c.e1\JT'J2A-71t:>tv/
rr TIME
(b) Name three factors that can affect the rate of a chemical reaction? -r~M~ATLJ~1
Ct>NC.E:I\I7'W47tO N/SUR~
(c) What infonnation is necessary to relate the rate of disappearance of re.actants to the rate of appearance of products?
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2.
Consider the hypothetical aqueous reaction A(aq) ~ B(aq). A flask is charged with 0.065 mol of A ill a total volume of
100.0 mI.. The following data are collected:
-r"'£
AATIO PllOk
MO~E.
i'l-lE.
E:tQUA--rt6A.J
~L..A-I\)~a
.
(a) Calculate the number of moles of B at each tune in the table. Asswne there are no molecules of B at time zero.
(b) Calculate the average rate of disappearance of A for each 10-minute interval, in lmits of mol/s.
(c) Between t '" 10 min and t '" 30 min, what is the average rate of disappearance ofB in units of MIs? Assume that the
volume of the solution is constant.
o.J
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o
'0
a
o
0.0'''1
MOLeS bP
2.0
'80
o.oZ3
O.02't
(~.6'12. -oob~/)
-- iJJCOS
-5
I a 5' It 10 I"'ID~
c.)
0.03'1
:zt> -
10 -2.0
=
Li (:)
so - "10
30
CO ,C'3t- ...(),b'!.l.)
--
lDOOS
::''.0 X/f~~
--
(0.6a/-D.63l1»
- IAOO~
::t.~c;) t I{)-6,..Dlh
I, 3 '"It>
-'I AJ
q
Is
[CH3NC] (M)
0.0165
0.0110
0.00591
0.00314
0.00137
0.00074
Time (s)
0
2000
5000
8000
12000
15000
Calcuk1te the average rate of reaction between, in MIs, for the time interval between each measurement.
__
-
(o.O/lOM
- o.t)Il~~)
= 2,"7S-. ,.~(.ulS
V
l :z.oot>s - 0 s)
Co. 00 ~q J ""t
- 0 .0110 M)::;.
,.
'.,D xl6 "MIs
Rcd;,:; - !()~7'fH.-O.O(JI3711~= 2,1l('~M
(SOOOS- zooC)s)
(O'0()3''I
At ~O.DD5q'~\~.23)1.'O~
ltooos-Sc«>S)
S
(1'5coDS-'ZOOOS:)
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5.
For each of the following gas-phase reactiollS, indicate how the rate of disappearance
rate of appearance of each product:
(a) HP2(g) -7 H2(g) + 02(g)
(b) L"fp(g) -7 2N2(g) + 02(g)
(c) N2(g) + 3H2(g) -7 2NH3(g)
a) 1he ro.-t.e o.f: o.#p~nc..e- .fo•... liz. ~ 02.
bj
=
=
of each reactant is related to the
rrkf.e of' dJf;.o.pfur'a,1t«. t'JP IIJJ ·
Ike. ro.t:e.. (Jf' ~V'C1nce....por
tVz. rAu' ".p d.'~pPttJrAI'1t2 t>F fJ~/).
11u... V"a.-te. "f' '¥peo..¥7Ul'-e.. .(1, ~ 02. ,'s 1: rQ-te.. oF- cJlSDfP€tJ.r4.ntL tJP N2.{) •
C)"1JIe rate
tR Of'petlt'tJ.nC.e -Po •.
cf Nz-.
Hz dJ'sa.ppea~ ot
6.
J
N#3 ,'s. -bolc.e -I:J..e. n:rtt of
.5 -t1~
~"'lI1Ict
ro.-te N#~ fAPpettrs"
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~a) COllSider the comb~stioll ofH2(g): 2H2~ + 02(g) -7 2H20(g). Ifhydrogen is burning at the rate of 4.6 molls, \vhat
the rate of ~ollSumpt1on of oxygen? What IS the rate of formation of water vapor?
(b) Thl:'rl:'3choll2NO(g) + C12(g) -7 2NOC!(g) is carried out in a closed vessl:'L If the partial pressure of NO is
dl:'creas11lgat the rate of 30 torr/min, what is the rate of change ofthe to!.,! pressure of the vessel?
IS
OJ ~ .~MbV,;
It- ~W\O
~b~
~mDfjs H~
If • II
WltJ
II s H-z..
lC
--
2 w»R f~ 1+z.0
-2. ~
b')
of-
fhssute-
dl).~
Is JJ.z..
-tr:> NO dttr~
=
crt
BDiorr/mll,.
16 -fD(t'/ml'n ·
fYe.ssut"e cl.v.~Tb Cll. c:leue.ases a.r
""iota' ~re
clect!asa ~ 115 -iz r..-/".. "I")
,
~~lJ.re
c:Lt.J.~ +0
NOcJ ,'netM'eS at
3D uf'r-/m
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