W04 MT2 soln

W04 MT2 soln - t: _.———‘ . ._--A. 4.”--M A. A......

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Unformatted text preview: t: _.———‘ . ._--A. 4.”--M A. A... "40*." 7— .‘h .933!“ x 25100 0. M2. A % 24002< 2550 ‘ 7L , -* " 3,51; 37mm mmst a F ’n 7. ,H‘VD'S’ : \ I C _ _ 9 h v ‘ . if!” 7711’ ‘ ’4 4.344.“.V .. A .4; . 414/11.A ; N . “ 4 H AIL/L. 4 J 114.4, I’ll My .7 .4 1 MI . .4 . .7 44 114/ A 1’ .4“; a; > ,. .._¢_.-,_,-_>_M._,;.HéMeagan.“ .,._..‘«_~__> .- - M-W ,7 , ,V -7 ,,.-m‘_-._‘._.,_. i i . w- ‘.,k__,_...___,..,,i : CHEM 110A MIDTERM #2 5 March 2004 NAME: 2. (35 points) Shown below is the phase diagram for pure substance with two stable crystalline forms (each form has a different crystal structure), Solida and Solid/3. Useful information (~375 K): [9(a) = 2.140 g/cm3 , pm) =x2.070g/cm3) Mw :. 39.2.60 ‘ T a. Identify (circle and label) in P vs T graph above the all triple points and critical points. ‘ b. Draw and label carefully a plot of ,u vs P for fixed temperature given by point A. What information regarding phase stability and properties such as molar volume and molar entropy can be extracted from this plot? \Mpw CHEM 110A MIDTERM #2 I 5 March 2004 NAME; c. Draw and label carefully a plot of ,u_ versus T for fixed pressure given by point B. What information regarding phase stability and properties such as molar volume and molar entropy can be extracted from this plot. ' ‘ d. Ifthe slope of the a, ,6 phase coexistence curve is dP/ dT)a,fl = 25.2 bar/ K , what is the value of the enthalpy for the a, ,6 phase transition? L- i {a I V V V I v x 4 44—- .wvrl ,, . 4-,(jm 04 - ‘ "—4 V ‘ _ c .f I -r— a? “"‘ >“7 -_ _, ..'V. :m. v >1 r21", / 5.- ,. f 6 " I'M ,_ - i“-'-_’§??"P§HE ,, I, ‘ _A __.‘_N..,_. _. » ,__.-,_. r- ~ n, _. -.._w - _ ___.. ._ ., - _ _ ._.._ __ _ s , I I \ 1/ a 1 I {'4‘ ‘ 7 ,. ‘- ’ “ -mfi ~ _ __ “._‘.,.__.._.__....‘, 7 _.__‘, » - _. ._.. w. .-..h..- ...-__\,..-‘..‘._ .. / .. ._ .. “fivfi H n... i ' . i : __.. .W A WW.” ,. ._-_. .. . .-..._.......- .Vn--,_,.__ .A _ .- V.__‘--r.~.¥_-.‘ v - 7 44—- ._ ,m. v .. .._..,_ - .0. 1,”; ____ -mefimw .V ¥.-.4.....,.__’.__~._.. -- .. .rh/‘ome ‘ 3 ¥ : ‘2 ' ' e__—%_,=". ' ...
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This note was uploaded on 04/03/2008 for the course CHEM 110A taught by Professor Schwartz during the Winter '06 term at UCLA.

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W04 MT2 soln - t: _.———‘ . ._--A. 4.”--M A. A......

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