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Unformatted text preview: Chemist}? 3321
Physical Chemistry I
Fall, zoo?
Exam #1 am LE); R = 8.314 smutK = cos: bahufmolK = sac emsuaum’molK 1. A Carnot cycle of one mole ofan ideal rnonatomie gas is composed of {I} an
isothermal expansion at 213 K in which the vnlmne is doublecl starting from an
initial pressure of I aim (2} an adiabatic expansion to 290 K (3} an isothermal
mmpmsian and firrallyr {4} an adiabatic compression back to the original state.
Ali steps are reversible. (:1) Find as, the heat exchanged, and the work done by
the system at each of the four steps and for the cycle. (b) using q and w for the cycle calculate the eﬂ'ieienejr of the engine as e = lwla'heat absorbed and compare
this to the value you get using the formula Th G] 553.: T1 Q Luz/o. ; uﬁfas ELLE. to =  mart in “slur. romanamﬁz — I I' 2. (a) Derive the expression Eli] = V Fifi] Earn the exact differemiat ferthe enthalpy.
3P T T P cm: Tag areal?
@ék “6%? ‘J
@: 4%)? :93: e._.""7i’r_51 ‘1r\I tel QT Cum. (1:!) Calculate the JouleThompson eoeﬂieieni, ﬂy, for a gas nbtgymg the equaﬁun
ofstatﬂ, me = RTU + WP}, 312?! K, when: B’RT = 41.? em Ema! and CI, =
2038 MaulK E11278 K, usingthe identity ex, egg— 6M? W I
P = :2; 4, Ewe
F? Jr: B‘Eﬁ a??? *5“ I #‘Teﬁﬁub 1:5

to I My: E] I 3. Given 111:: following dam calmllaie the Third law 31111013}? for liquid land at SIDE! C. $1293 K} = 64.3 meolK (1.,(Pb,s) = 22.13 +0.91 ITET (MnobK) T“? 3214 C t dblPm = 47"‘Ir'ﬂ meul Cp{Ph,l} = 32.5 a 0.003 T {MimiK}
en— 15 *3. Wk 5 h& 113 E.
Exam c.) = 31349 + Ci“ ‘1“ " 1;... 4' Sim (2"de
cu: 5.: {pm
.= {pug}? ‘3 % L111}; 5.:2H‘LiT] aft 1 L‘EE' y,
_ ‘T J" tam
w 1r 1‘11. S115 (31.15,  {33.6631 ? &T
T {pm 113
= (pfHZ + tidahtﬁg) i— {3.0:sz (mm1q13 ' “Tag + ELSLwn = f9”:~% Ht...“ i— 3.3“ +131; a, $1.3 * 03L = 901A (Spay, 4. In the: transition Ca003{aragonite} } CaCOﬁcaicite)
$63293) = —LID k1. av... = 2.?5 mL. At what plasma would araganite become H19. stable form a1 25 C? (b) Using M098) = 0.2 kJJmoL ﬁnd the. temperatum
at Mich aragnnite beam the stable form at I aim pregame. 5,) ac. mm. = ESqua‘) » hawk? = o M ‘ MM QW M
a»... 1.115967%
MM 3mm,
Q”) G/T :. 5H
3%. ..
:3
Egg _ agar.) —_. .5.le i: i J:
1 T. 1‘2. It)
5
{no " Ditto J_.  l—
' 1‘1; (TL 1% 11.

34320
‘ 1: 2. LL01»:
 “e
3E9. 5. One mute ofan idcal monatumic gas initially a1 STP (1 arm; 2T3 K) ﬁxpﬂﬂdS
isothermally and irrevm'sibly to 44.8 L under mnditions such 1that w = 415.? Jnulas. Calculaic ES and EG for the process. ”'3": ‘HB."'1 :5— Cer “thaw AS: muﬂuﬁg— . Q5519M1=
I
ma: Mam: ﬁma —— ~G139Eﬂb) EE:C} 5:61 LE ...
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 Fall '09
 Goux
 Physical chemistry, pH

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