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CHM 210 CHEMISTRY ONE SPRING 2010
EXAM 2
Time : 7:30p.m. - 8:45 p.m.
I VERSION 1 I
1. Print your name and student ID number on your scantron card and fin in the
appropriate circles for your ID number.
2. Mark your test version number (1 or 2).
3. Use a soft #2 pencil only, and blacken circles completely.
- If you decide to change an answer, erase the unwanted mark very carefully.
5. Mark the one best answer to each question. Any question for which more than one
response has been blackened will not be counted.
6. There are 25 questions in this exam and your score is based solely on the number
of questions you answer correctly.
IA SA
h = 6.63 x 10'" Js
c = 3.00 x 10' mi.
A~~
mv
E;;hv C=AV
AE=-R H [L.2.] n~ n~
AE =q +w w= ·PAV
q=CxmX.1.t q = CAt
K.E. = ~mv' (^) 101.3J=1 Latm PERIODIC TABLE OF THE ELEMENTS ,.--,-- (^) ,,-- ,.~^ H^ 2A 3A^ 4A^ lA^ 6A^ 7A^ He
3 ,^5 6 7 ,^ ,^ .m 10
U·12^ U^ ~.~12Be^ 10S1B^1101 C^1401 N^ l~.OO^0 r^ Ne
II u (^) II 14 II "00^ ro^ IS
nw^ Na^ Mg2'.}(J 38 48 l8^ 6B^ 7B^ 8B^88 SB^ IB^ 2B^ ~.Al^ Si^ P^ "S^ CI^17 N I'
19 20 21 zz 2J 24 2S 26 rt '00^ '""^ 31.)(^ )lOS ".
J~,I~ <W,01^ K^ Ca^ #.'S,^ '17.90Ti^ 0#y^ 32.00C, Mn.~^ ~Mf,^ S893 Co^ ~R70Ni"^ ~B~Cu^29 ~.19Zn^30 ~.n G.J1^ 7.!.S9 GeJ2^ 74.\l2A,^ "^ Se"^35 B,^ Kr^36
J7 38 39 40 ••^ ••^ M"
" "^ "
Rb S,^ Y Z,^ Nb Mn T' Ru Rb" Pd" Ag" Cd.. "In Sose^ Sb^51 Tesz^53 I Xe "
"" 55 _nl 56 ~" 57 n 12 '12.91 13 9S." 74 75 • 101.1 76 l~~ 77 '00• 18 107919 1\1.• 80 1141 \181^ '218^ l/H^1170 1 Jl^ J
C, (^) Ba La Hf Ta az^83 '"^85
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87 Fr Rnes "' 104 I" 106 101 10. 109 "0 '" "2 1" 116 - 2lC^ =
,':' Rf^ Ob^ Sg^ Bh^ H,^ Mt^ 0,^ UUlI^ U,b ~ L::'"
"" ~;.^ (261^ (l61^000 ('M)^ om^
,., (^) ., (^) n 121'1) (^) =, sa
611 61 62 6J
es 66 67 se 69 to 71
Ce,~, (^) 1.I(),9P, Nd~, Pm Sm Eu Gd Th Dy Ho E, (^) Tm Vb Lu
so 91 92 '"9l^ 15Il.•^ Inc^ IlU^1119 'U,^ 1,ioU^ \61)^ ,~.m.^ 17'.
96
Th P. U Np Pu Am Cm Bk " Cf" "^ lllO^101 102 IOJ
!JZO :!ll.O 1:lU fm^ Md^ No^ L,
"" '"^ '"^ ,~2.1^ ",^ m^ m^ DO^ ",^ ,.
1. An electron whose mass is 9.11 x 10-^31 kg is accelerated to a speed of 5.0 x 10^6
m/s. What is the kinetic energy of the electron in joules? 1 J = 1 kg m^2 /s^2
a. 2.4 x 10.^18 J
b. 1.1x10·^17 J
c. 1.5 X 10.^14 J
d. 3.2 X 10.^17 J
e. 1.6 x 10.^12 J
2. An exothermic process _
a. raises the temperature af one gram of a substance by one degree Celsius.
b. takes in heat from the surroundings.
c. increases the acidity of the surroundings.
d. gives aff heat to the surroundings. e. releases carbon dioxide into the surroundings.
3. What is the specific heat of iron, jf a 47.00 g sample of iron absorbs 914 J of heat
and its temperature rises from 28.34 °C to 71.75 QC? a. 0.448 Jig -c
b. 1.86 Jig "C
c. 6.61 Jig "C
d. 0.492 Jig "C
e. 0.112 Jig 'c
- Given: H2(9) + Y, 02(9) ... H20(1) ....Ho~,^ = -286 kJ What is the enthalpy change for the fallowing reaction?
2 H20(1) ... 2 H2(9) + 02(9)
a. ....Ho= -286 kJ
b. ....H'= +286 kJ
c. /lliO = -572 kJ
d. ....flO = +572 kJ
e. /lli' = -143 kJ
fiH"OOl=?
2
8. Calculate the change in energy, tJoE,of a gas if the gas expands and does P-V
work on the surroundings equal to 525 J while absorbing 972 J of heat from the
surroundings.
a. +1577 J
b. -479 J
c. -1577 J
d. +447 J
e. -334 J
9. A gas is compressed in a cylinder from a volume of 20 L to 2 L by a constant
pressure of 10 atm. Calculate the amount of work done on the system.
(101.3J = 1 L atm).
a. 1.01 x 104 J
b. -180 J
c. 1.82 x 104 J
d. 1.97 x 10 8 J
e. 180 J
10. When 0.1375 9 of solid magnesium is burned in a constant-volume bomb
calorimeter, the temperature increases by 1.126D C. The heat capacity of the
bomb calorimeter, determined in a separate experiment. is 3024 Jrc. Calculate
the heat given off by the burninq magnesium in kJ/moi. (Mg = 24.3 glmol)
a. -1.14 x 10' kJ/mol
b. -82.4 kJ/mol
c. -8.52 x 10' kJ/mol
d. -602 kJ/mol
e. -980 kJ/mol
4
11. A 44.0 9 sample of an unknown metal at 99.0"C was placed in a constant-
pressure calorimeter containing 80.0 9 of water at 24.0"C. The final temperature
01 the system was lound to be 28.4"C. Calculate the specific heat 01 the metal.
(The specific heat capacity 01 water is 4.184 J/g·C.)
a. 2.03 J/g··C
b. 1.01 J/g·"C
c. 0.474 J/g··C
d. 0.246 J/g.·C
e. 3.22 J/g·"C
12. Which of the following regions of the electromagnetic spectrum has the shortest wavelength?
a. x-rays
b. radio waves
c. microwaves
d. gamma rays
e. Infra-red rays
13. What is the wavelength, in nm, of a photon with an energy of 5.87 x 10-^20 J?
a. 3.39x 10' nm
b. 4.55 x 10^2 nm
c. 2.19x10'nm
d. 2.89 x 10' nm
e. 3.69 x 10^4 nm
14. Calculate the energy change, in J, associated with an electron transition from n = 2
to n = 4 in a hydrogen atom.
a. 4.1 X10·'9J
b. 6.2 x 1014 J
c. 5.4 x 10·'· J
d. 8.2 X 10" J
e. 2.1 x 10.^7 J
,
='"",
- The electron configuration for K is. a. ls22s22p63s23p64So3d b. 1S22s22p63s23p64s c. ls22s22p63s23p63d64s^1 d. ls22s22p63s23p64s^1
e. nane ofthe above
19. An atom of vanadium has _ unpaired electrons and is _
a. 0, diamagnetic
b. 2,diamagnetic
c. 3, paramagnetic
d. 5, paramagnetic e. 4, diamagnetic
20. Which of the following is the electron configuration of the Fe3+ ion?
a. [Arj3d
b. [Arj4s13d
c. [Ar]4s23d
d. [Ar]3d
e. [Ar]4s23d
21. In general, as you go across a period from left to rightin the periodic table the
atomic radius , the electron affinity , and the first ionization energy _ a. increases, decreases, increases b. increases, increases, decreases c. increases, increases, increases d. decreases, increases, increases e. decreases, increases, decreases
7
- Which of the following atoms has the largest radius?
a. Na
b. C
c. Ba
d. He
e. H
23. Arrange the following in order of increasing size (smallest first),
a. 02 -< F < Na" < Mg^2 +
b. F -c 02 -< Mg^2 + < Na"
c. Mg^2 +< Na+<F<02- d. Mg^2 + < Na+ < 02 -< F
e. 02 -< F< Mg^2 + -c Na+
- The elements C, Be, Na, Mg, Ne, 0 listed in order of increasing first ionization energy are:
a. Ne, 0, C, Mg, Be, Na
b. Be,Na,Mg,C,O,Ne
c. Na,Be,C,O,Mg,Ne
d. Ne,Na,Mg,O,C,Be
e. Na, Mg, Be, C, 0, Ne
- Which equation correctly represents the process associated with the "electron affinity" of chlorine?
a. CI (g) + e-~ Cl"(g)
b. CI (g) ~ CI>(g)+ e c. cr^ (g) +^ e' ~^ CI'- (g) d. C,>(g) +^ e ~^ C, (g) e. cr^ (g) ~^ CI (g) + e-
8
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