Quiz 6 Chemla Sprine 2012 Name KEY
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This is a takehome quiz, given 3l6l2OLZ and to be returned at the start of class on 3l8l2OL2.
1.) 1.000 kg of dry ice (solid COz) is put in an airtight container with a volume of 5.000 L.
This is an idiotic and truly dangerous thing to do since it will sublimate to form a gasl
When the temperature in the container reaches 3_0 oC, what is th.g pressure of the COz
sas inthe container? t, ooj]$ ^ re x r#^ = -VQ,?Q.,*I
lt3,o "r^ ?= 4$I: t =tx3.ag
2.1
LFelix has 3 containers of gas. The COz has a pressure of 2.13 atm in 1-.50 L. The H2 has a
pressure of 0.861 atm in 1.00 L. The Ar has a pressure of 1.L5 atm in 2.00 L. lf you
connect allthese flasks, ignoring the volume of any tubing, what is the final pressure of
V4^*t "r-1,}t
P,{,'Pr{- ';o' =
- i ?',F*Ir'
.*h' lir' #,
'iii = i,' ,i^l''^)ta 33rt 'f3,.^*t
*(
Y,t (o,Bbrafl(t'd)h,lS I
ff. o'rii"ir, ,lt"'''olJstre is 1.00 atnf tr" -'"r$fl"'Pf"i:i;,t""-n, ti'r1.btil t"r"
fraction of 0.2L).
a. What is the partial pressure of 02 in the air in Alameda t O,8l &) atm
b. What should the mole percent of 02 be in a diving mixture for use at 250 feet
underwater where the pressure is 8.38 atm, so that the partial pressure of Oz is
the same as it is in Alameda?
Wmolepercentor o, offiDk "fraction
4.) Trinitrotoluene is a solid explosive, abbreviated TNT, cTHs(No2)3 . & l'ffi{J
2C7Hs(NOz)s(') ) 12 CO1g1 +2C1'1 +5 H21gy +3 N21gy
a.) What is the total number of moles of TNT before the explosion?I I l\ I UelUle Llle expluslull r /)
t,ooT^{ff,ffi=
4 , Ll O motes rNr
b.) What is the number of moles of each product after the explosion?
4 ,'l O moles cll,o moles Hz
b,b0
mpletely detonated and
-6*e(tr
moles CO
moles Nz
= Ab,4 +4,6o + tl,O
: 4+,o
c.)