exam3 answers - C hem.1 310S pring2007E xam 3 T estF orm A...

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Chem. 1310 Spring2007 Exam 3 Test Form A Each question worth 6 points 1. Two metals of equal mass with different specific heat capacities are subjected to the same amount of heat. Which undergoes the smallest change in temperature? A) You need to know the initial temperatures of the metals. B) Both undergo the same change in temperature. C) You need to know which metals you have. _D\ fne metal with the lower heat capacity. ( E) Jfn. metal with the higher heat capacity. ? .-. : v cp / 4T 4T= e /J- fr(s C> (r : -J- (> /ilr 2. In which case must a reaction be spontaneous at all temperatures? A)nffispositive,A^lispositive. aG*4H-,faS B) A,H:0, A,S is negative. A aS:0, A,H is positive. QDAH is negative, AS AIl is negative, A,S 3' Which is the correct mathematical expression for the molar solubility (s) in mol/L (S) oL. _J Fe:(Poq)z? / /?, (nur).(g-): 7 t*'/b + 4 Fry ' A9::^. r nri'' - /' 3s 2s \9)) ro8s' YIA;t K.rE (rzr)r{rer-)- ;; ;s' I pr);(z-r)z = ';;;r';;{ 4. consider the freezing of liquid *u,"lu, !#{:.:.process what are the signs for Arl'As'andAG? -/rr,oa{vooot >i'ta'6y*7goc' _ All A.r AG r $; -; 'r).ya,,/ny,Je'u5 a6:/5w'n/(- 3] l; ; t)'/,rrasa,,,J 'dS*/?#anvr # E) + n{-ftse/ts/ 6l/:rt,f'r'{Y/** 6x f;#'r'uvf /t Page 2 of 8 (?er.,*/" lrr-#) \-/
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Chem. 1310 Spring2007 Exam 3 Test Form A I. (See diagram above.) II. Br2(g) -+ Br2(l) D{crlrASe". III. NaBr(s) Na*(aq) + Ba(aq) IV. 02(298 K) + OzQ73 K) V. NH3(1 atm,298 K) NH3(3 atm,298l<) P{t;$qn1JZ 5. Methylorangeisanindicatorwith aKuof I x 10*. Itsacidform,Hln,isred,whileits I base form, In , is yellow. At pH 6.0, the indicator will be_ trH *J - / o' PH . /O Pn A) brue. H fn * // l* rn Cd;fi*
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exam3 answers - C hem.1 310S pring2007E xam 3 T estF orm A...

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