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What is the energy in joules of a mole of photons with the energy of the 434 nm spectral line of hydrogen?

Study Guide Home work.doc

ATLANTAMETROPOLITANCOLLEGESCIENCE,MATHEMATICSANDHEALTHPROFESSIONDIVISION
FALLSEMESTER2010GENERALCHEMISTRYICHEM1211
Examination:QuizforChaptersSEVENANDEIGHT
Name___________________________________
Date:NOVEMBER11,2010
INSTRUCTIONS:
(1)PleasewriteyournameandquestionIDonyourscantronandyourworksheetforyourtheoryandcalculationproblems.
(2)PleaseuseshadeTrue=AandFalse=B
(3)Answerallmultiplechoicequestionsuntoyourscantronsheet
(4)AnswerONLYthetwoboldandunderlinedcalculationproblemsonyourcleanworksheet.
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
1)

14.0gof
metalat
24.0C
has250
joulesof
heat
addedto
it.The
metal's
specific
heatis
0.105J/g
C.What
isitsfinal
temperatu
re?

1)

_______
A)

[(914.0)

(0.105)/250]+24.0
B)

(14.0)

(0.105)/250
C)

[250/(14.0)

(0.105)]
D)

(250)

(14.0)/0.105
E)

noneofthese

2)

Whichof
the
following
isNOTa
thermody
namic
function
ofstate?

2)

______ _
A
)

eha
nlp
t y

density
D)

volume
E)

temperature

3)

The
complete
combustio
nof
propane,
C3H8(g),
is
represente
dbythe
equation:
C3H8(g)
+5O2(g)
3
CO2(g)+
4H2O(l)
H=
-2220kJ
How
muchheat
isevolved
inthe
complete
combustio
nof20.0
L
C3H8(g)
atSTP?

3)

______ _
A
)

1007kJ

B)

1982kJ

C)

2486kJ

D)

495kJ

E) 9 9


Oxygen
gasat
34.5Cis
compress
edfrom
45.7Lto
34.5L
againsta
constant
pressure
of750
mmHg.
Whatis
thework
donein
joulesby
the
system?

4)

______ _
A
)

1
. 10
13
2

9.09104
D)

-9.09104
E)

-1.12103

5)

How
muchheat
is
involved
inthe
complete
combustio
nof2.50
kg
propane,
C3H8?
Hcomb
=-2219
kJ/mol.

5)

______ _
A
)

5
. 10
53
5kJ

503kJ
D)

1.26105kJ
E)

49.7kJ

6)

The
combustio
nof90.0
gof
oxalic
acid,
C2H2O4(
s)ina
bomb
calorimet
erwhose
heat
capacity
is4.60
kJ/C
causesthe
temperatu
retorise
from25.0
Cto79.6
C.What
istheheat
of
combustio
nof
oxalic
acid?

6)

______ _
A
)

-k
2J/
5m
1ol

-54.6kJ/mol
D)

-211kJ/mol
E)

-21.2kJ/mol

7)

Theheat
of
combustio
n,
Hcomb,
of1butene(l),
C4H8(l),
is-2696.9
kJ/mole.
Fromthe
following
valuesof
Hf
CO2(g)=
-393.5
kJ/mol
andHf
H2O(l)=
-285.8
kJ/mol,
calculate
the
standard
enthalpy
of
formation
of
butene(l).

7)

______ _
A
)

-2017kJ

B)

+2017kJ

C)

-3376kJ

D)

-20.30kJ

E) - 1



Giventhat
Hf
[CO(g)]=
-110.5
kJ/mol
andHf
[COCl2(g
)]=
-219.1
kJ/mol,
whatis
the
enthalpy
of
reaction
forthe
formation
of
phosgene,
COCl2
from
carbon
monoxide
,CO,and
chlorine
gas,
Cl2(g)?

8)

______ _
A
)

+329.6kJ

B)

-219.1kJ

C)

-110.5kJ

D)

+110.5kJ

E) - 1



Consider
the
reaction:
4NH3(g)
+5O2(g)
4
NO2(g)+
6H2O(l)
Hf
-46.19
0.00
90.37
-285.85
kJ/mol
Compute
Hfor
this
reaction.

9)

______ _
A
)

-241.67kJ

B)

-149.29kJ

C)

-622.62kJ

D)

-1168.9kJ

E) 9 8

10)

Some
"beetles"
defend
themselve
sby
spraying
hot
quinone,
C6H4O2(
l),attheir
enemies.
Calculate
Hofor
this
reaction.
C6H4(OH
)2(l)+
H2O2(l)

C6H4O2(
l)+
2H2O(l)
Given:
C6H4(OH
)2(l)
C6H4O2(
l)+H2(g)
+177.4kJ
The
standard
enthalpies
of
formation
of
H2O2(l)
and
H2O(l)
are-187.4
and
-285.8
kJ/mol,
respective
ly.

10)

______
A
)

-561.6kJ

B)

+79.00kJ

C)

-384.2kJ

D) - 2
11)



An
element
involved
ina
formation
reaction
asa
reactantis
NOT:

11)

______

pure
A
)

at1.00M

concentration
D)

at1.00atm

pressure
E)

noneofthese

12)

Calculate
the
quantity
ofheat,in
kJ,
required
toraise
the
temperatu
reofa
2.15kg
ironbar
24.0C
(specific
heatof
iron=
0.473J/g
C).

12)

______
A
)

109kJ

B)

51.6kJ

C)

24.4kJ

D)

11.3kJ

E) 2 3

13)

5.04103moleof
a
compoun
disadded
to41.0g
ofwater
ina
styrofoam
cupand
stirred
untilit
dissolves.
The
temperatu
reofthe
solution
changes
from
23.460C
to23.420
C.What
istheheat
of
solution
ofthe
compoun
d
expressed
inkJ/mol?
Assume
the
specific
heatof
the
solutionis
4.18J/g
C.

13)

______
A
)

1kJ/
. mo
4l

-2.8kJ/mol
D)

2.8kJ/mol
E)

-0.035J/mol

14)

Determin
ethe
enthalpy
changein
the
following
equation:
H2O(g)
H2(g)
+1/2
O2(g)
Hf
H2O(l)=
-285.8
kJ/mol

14)

______
A
)

13.4kJ

B)

285.8kJ

C)

-241.8kJ

D)

-285.8kJ

E) 2 4

TRUE/FA
LSE.
Write'T'
ifthe
statement
istrueand
'F'ifthe
statement
isfalse.
15)

The
maximum
amountof
workis
provided
bya
reversible
process
because
equilibriu
m
between
the
system
andthe
surroundi
ngsis
always
maintaine
d.

15)

______

MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthe
question.
16)

Thetwo
thingsthat
can
change
the
internal
energyof
asystem
bytheir
absorptio
nare
workand:

16)

______

m
ass
A
)

pressure
D)

color
E)

noneofthese

TRUE/FALSE.Write'T'ifthestatementistrueand'F'ifthestatementisfalse.
17)

An
expansion
ofgasby
asystem
means
thatthe
internal
energyof
the
system
increases.

17)

______

MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthe
question.
18)

Oxygen
gasat
34.5C
expands
from34.5
Lto45.7
Lagainst
aconstant
pressure
of750
mmHg.
Whatis
thework
donein
joulesby
the
system?

18)

______
A
)

- 9
910
. 4
0

4.55103
D)

-1.12103
E)

9.09104

19)

Theheat
of
combustio
nof
methane
is-50.38
kJ/mol.
How
many
molesof
methane
mustbe
burnedto
produce
137kJof
heat?

19)

______

2.72
A
)

0.367
D)

1.37
E)

noneofthese

20)

Lead,
water,
sulfur,
and
arsenic
have
specific
heatsof
0.128,
4.18,
0.706,and
0.329Jg1oC-1,
respective
ly.Which
ofthe
following
would
needthe
smallest
quantity
ofheatto
change
the
temperatu
reof5g
by10oC?

20)

______
A
)

arsenic

B)

lead

C)

sulfur

D) w a

21)

Whatis
the
reaction
forthe
standard
enthalpy
of
formation
for
CdSO4(s)
?(Cd(s)is
thestable
formof
cadmium.
)

21)

______
A
)

C2
H
dSO
( (a
4
N
q)
O

32
) HN
2O3
( (aq
a)+
qCd
) SO
4(s
+)

CdO(s)+

SO3(l)CdSO4(s)
D)

Cd2+(aq)+2 SO42-CdSO4(s)
E)

noneofthese

22)

Whatis
the
reaction
forthe
standard
enthalpy
of
formation
for
HCl(g)?

22)

______
A
)

I 2H
C (g
3
l )
3
( HI(
gg)
) +3
HC
+l(g)

1/2H2(g)+

Cl2(g)HCl(g)
D)

NH3(g)+

Cl2(g)NH2Cl(g)+HCl(g)
E)

noneofthese

23)

Usingthe
heatof
combustio
nof
methanol
as-726.6
kJandthe
following
data:
C(graph)
+1/2O2

CO(g)
H
=-110.5
kJ
C(graph)
+O2(g)

CO2(g)
H
=-393.5
kJ
H2(g)
+
1/2O2(g)

H2O(l)
H
=-285.8
kJ
Determin
eHfor
the
following
reaction:
CO(g)+2
H2(g)
CH3OH(l
)

23)

______
A
)

-157.8kJ

B)

-128kJ

C)

157.8kJ

D)

-349kJ

E) 1 2

24)

Choose
the
INCORR
ECT
statement.

24)

______
A
)

Pen
oerg
t yis
eene
nrgy
t in
i acti
aon.
l

Heatmoves

fromawarmerbodytoacolderone.
D)

Kineticenergy istheenergyofmotion.
E)

Heatisenergy transferredasaresultofatemperaturedifference.

SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.
25)

The
standard
heatof
formation
ofsolid
ammoniu
m
bromide
is-270.8
kJ/mol.
Writethe
chemical
equation
forthe
reaction
towhich
thisvalue
applies.

25)

______ _______

MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementor
answersthequestion.
26
)

Thefour
quantum
numbers
ofthe
LAST
electron
tobe
placed
intoaCa
atomare:

26)

______
A
)

n=
1,
=m
=
40,
, ms
=
-1/
2

n=4,=0,m =0,ms=-1/2
D)

n=4,=1,m =0,ms=+1/2
E)

noneofthese

27)

Choose
the
INCORR
ECT
statement
concernin
g
electroma
gnetic
radiation.

27)

______
A
)

A
00
An
pgst
hro
oms
t has
oone
n hal
fas
w
i mu
t ch
hene
rgy
aas
a
ph
w
aoto
vn
ewit
l ha
ewa
nvel
geng
t th
hof
25
o00
f An
gst
5ro
0ms.

Thegreaterthe frequencyoftheelectromagneticradiation,thegreatertheenergyoftheradiation.
D)

Thespeedof ultravioletlightraysisfasterthanx-raysinavacuum.
E)

Infraredlight

28)

hasalongerwavelengththanultravioletlight.

Whenan
electron
goesfrom
ahigh
energy
statetoa
lowone,
what
occurs?

28)

______
A
)

T
om
hmo
eves
fast
aer.
t

Lightisgiven off.
D)

Thisprocessis notpossible.
E)

noneofthese

29)

Usethe
spdf
notation
towrite
outthe
complete
electron
configurat
ionofBr.

29)

______
A
)

[ 3d
K
10
r2
4s
]
4p

4

[Ar]3d94s24p6
D)

[Ar]

3d104p65s2
E)

[Ar]4s24p24d9

30)

How
many
unpaired
electrons
areinthe
ground
state
electron
configurat
ionof
calcium?

30)

______
A
)

2

B)

5

C)

3

D)

1

E) 0

31)

Writethe
appropriat
evalues
ofnand
forthe
orbital
designatio
n3s.

31)

______
A
)

n=
3,
=1

n=0,=3
D)

n=3,=0
E)

n=3,=2

32)

A
radiation
detector
exposed
to
sunlight
records
the
energy
fallingon
agiven
areaeach
unittime.
Ifsucha
detector
hasa
readingof
0.698cal
cm-2min1,how
many
photons
of
sunlight
are
striking
eachcm2
inone
minute?
Assume
the
average
wavelengt
hof
sunlightis
460.nm.
(4.184J=
1calorie)

32)

______
A
)

12
. 10
618

4.321019
D)

9.631019
E)

6.761018

33)

Whichof
the
following
statement
s
concernin
g
quantum
numbers
isNOT
correct?

33)

______
A
)

"ien
tati
m
"on
of
dan
eorb
nital
owit
t h
eres
spec
tto
othe
r oth
ers.

Thefour

quantumnumbersarederivedfromwavemechanics.
D)

"n"relatesthe mostprobabledistancefromthenucleus.
E)

"l"denotes

34)

geometricshape.

Usethe
Balmer
equation
to
determine
nforthe
spectral
lineof
wavelengt
h434nm.

34)

______
A
)

7

B)

3

C)

5

D)

6

E) 4

35)

Whichof
the
following
isNOT
trueofa
wave
function
as
suggested
byErwin
Schroding
er?

35)

______
A
)

I ma
t the
ma
i tica
sl
equ
aati
on.

Itisdenotedby psi().
D)

Itcandescribe anyparticlewithwavelikemotions.
E)

Itcorresponds toastandingwavewithintheboundaryofthesystem.

36)

Whatis
the
energyin
joulesof
the656
nm
spectral
lineof
hydrogen.

36)

______
A
)

1
. 10448
5J

1.3010-22J
D)

3.0310-28J
E)

4.3510-31J

37)

Calculate
the
energyin
kJ/molof
lightwith
a
wavelengt
hof360
nm.

37)

______
A
)

02
. kJ/
3mo
3l

6.63103

kJ/mol
D)

332kJ/mol
E)

5.5210-19

38)

kJ/mol

Whatis
the
wavelengt
h
associated
with
electrons
traveling
atone
onehundredth
thespeed
oflight?

38)

______
A
)

42
1nm

243nm
D)

12.5nm
E)

7.9810-2nm

39)

The
existence
of
discrete
(quantize
d)energy
levelsin
anatom
maybe
inferred
from:

39)

______
A
)

es
xon
pthe
eph
r oto
i ele
m
ctri
ec
neff
t ect

x-ray

diffractionbycrystals
D)

atomicline

spectra
E)

visiblespectrum

40)

Thefact
thatthe
valence
orbital
configurat
ionof
nitrogen
inthe
ground
stateis
2s2,
2px12py1
2pz1isan
illustratio
nof:

40)

______
A
)

t i
hEx
eclu
sio
Pn
aPri
unci
l ple

theBohr

Theory
D)

theAufbau

Principle
E)

theHeisenberg UncertaintyPrinciple

41)

Whatis
an
acceptabl
evalue
forthe
missing
quantum
number?
n
=4,=2,
m=0,
ms=?

41)

______
A
)

3/2

B)

0

C)

2

D)

1/2

E) 1

42)

Whichof
the
following
subshells
is
correctly
designate
d?

42)

______
A
)

2p6

B)

1p5

C)

3f2

D)

3s3

E) 4 d
43)



Whatis
the
energyin
joulesof
amoleof
photons
withthe
energyof
the434
nm
spectral
lineof
hydrogen
?

43)

______
A
)

26
. 1074J

5.7810-25J
D)

434J
E)

9.2110-4J

44)

How
many
photons
oflight
with
frequency
5.50
1015Hz
are
required
toprovide
1kJof
energy?

44)

______
A
)

310
. -16
6ph
4oto
ns


2.741020

photons
D)

4.5610-4

photons
E)

3.6410-18

45)

photons

Whatis
the
wavelengt
hofthe
lineinthe
Balmer
seriesof
hydrogen
correspon
dingto
the
transition
fromn=
5ton=
2?The
constant
for
Balmer's
equation
is3.2881
1015s1.

45)

______
A
)

535nm

B)

304nm

C)

30.4nm

D)

329nm

E) 4 3

46)

The
relationsh
ip
between
the
frequency
oflight
andthe
energyof
thelight
was
postulated
by:

46)

______
A
)

R
rt
oBu
bnse
en

MaxPlanck
D)

AlbertEinstein
E)

Johannes

Rydberg


47)

Exception
sto
________
are
represente
dby
chromium
and
copperin
the4th
rowofthe
periodic
table.

47)

______
A
)

H
d's
uRul
ne

theBohr

Theory
D)

theHeisenberg Principle
E)

theAufbau

48)

Principle

The
ground
state
electron
configurat
ionfor
antimony
is:

48)

______
A
)

[ 5s2
Kd
5
r 10
]
5p

3

[Xe]

5s25d105p3
D)

[Xe]

5s24d105p2
E)

[Kr]

4d105s25p3

49)

Whatis
theorbital
designatio
nforthe
quantum
numbers
n=2,l=
1?

49)

______
A
)

2d

B)

3s

C)

3p

D)

2p

E) 2 s
50)



Whichof
the
following
isNOT
trueabout
zero-point
energy?

50)

______
A
)

I ow
t est
ene
i rgy
sval
ue
t of
ha
epar
ticl
l e.

Becausethe

zeropointenergyisnotzero,theparticlecannotbeatrest.
D)

energycorrespondston=1.

Zeropoint
E)

It'svaluecanbe zero.

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