Chemistry Practice Exam: Thermodynamics and Phase Equilibria, Exercises of Chemistry

Download Chemistry Practice Exam: Thermodynamics and Phase Equilibria and more Exercises Chemistry in PDF only on Docsity! Name Practice CWID Section ___________ Sections (Lab) 27561 (M AM), 27562, (M PM), 27563 (T PM), 27564 (W AM), 27565 (Th PM) 27567 (F, AM), 27571 (Th AM) Chemistry 1515 F24 Hour Exam #1 (Blum) Instructions: You may use a calculator. Only this top page (for multiple choice) and the "show work" problems will be graded. Mark your letters clearly (UPPER CASE PLEASE). If we can't easily determine your intention, it will be marked as incorrect. Multiple choice 4 pts ea., show work problems 7 pts ea. For multiple choice questions, answers elsewhere on these problems will not be graded. # Answer # Answer # Answer 1 7 13 2 8 14 3 9 15 4 10 16 5 11 17 6 12 18 Total For worked problems – Show answer and your work on attached pages (not here). Make sure your answers are clearly marked with a box and remember to include units. # Score # Score Top Total /72 19 21 Bottom Total /28 20 22 Grand Total /100 0 pts. The given name of the person called Pistol Pete was _____________________ Possibly useful constants: R=8.314 J/(k mol) = 0.08206 L atm/(K mol), NA = 6.022x10-23 Some constants for water. ρ (water) = 1.00 g/mL, Cp(solid) = 37.7 J/(mol⋅K), Cp(liquid) =75.4 J/(mol⋅K), ∆Hfusion = 6.01 kJ/mol, ∆Hvaporization = 40.7 kJ/mol, ∆Hsublimation = 51.1 kJ/mol (You may assume that these are constant with temperature, hence CP.) Equations: q = n Cp ∆T or q = m Cp ∆T; q = n ∆Hwhatever or q = m ∆Hwhatever ln P!"#$% = '− ∆'!"#$% ( ) × ) * + const. You need to derive equation for P1, P2, T1, T2 Amountgas = kHL Pgas; % mass = mass solute/total massx100%; XA = molA/(molA+molB); m = moles solute/kg solvent; PA = XA•P°; Ptotal = PA + PB; (molA/molB)vap = PA/PB; (XB)vap = PB/Ptotal; ∆Tf = -Kfm, ∆Tb = Kbm; πV = nRT; for electrolytes modify with i=mol of species in soln./mol solute dissolved Note: Be careful to distinguish between molality (m) and molarity (M). Y ou r a ns w er s h er e (90) si 7) (ss) (usa) so (isa) (ra) Gro (era) (rr) (get) | 68CO'SEC | ssceoTEc| ISCO TET IT] ON} PA] “4} SH | JO | Ya | WO] wy | od N | O | Pd | UL £01 zor tor oor 66 86 6 96 $6 +6 %6 16 06 isstit | FoELt ]icreesst] scot |ecoeerst| oscor |rescosst] scist | rserst | oeost | Grn | revert |sozosori| orrort nT] qk} ML} aq on | Ad} aL | PD | ng | ms }ug | pn | ta | 2D u ou 69 89 i 99 s9 +9 9 z 09 65 8s SOREL: SOAS (E62) (sd) Fa aa | cd | 2 | od | God | wo | God | Gd | ad | Gd] oo] eo eee We| SH | Wa} ®S |} 9d] FA] OV | PU] sit ott Fir ur ut oll 60T sor Lor 901 sot vor 68 83 “a | (ow (6oz) |seosesoc] cxoz | esse ror gu ss9oe 961} sLos6t | LITZ6t | ecost | cowost | FeEsT | 6LPSOST| Grsct |ssoeset | LzeLEt |srsoezEr wa} IV | Od | Ta | Ad | IL H] "V] jd | 2) sO} PM] M ] PL | FA | PT} PA} SD 98 s8 +8 8 zs 18 08 6L BL u 9 se te e w is 9s ss exter [irrossct] ogczr | oscict | ost | sisrtt | tircit | zssszor| crsor lossoszor| zotor | (6) | vese | sesosce| tects | sssooss| cous | siorss “x} I aL} 4S | Us | UU | PO} Sv} Pd | Ta] Ma] OL | OW] AN | IZ A IS} vd ¥s & zs Is os or SF uv oF st tr F zr Ir oF 6£ se ig oses | F066 | 9682 |osicer.| I9cL | ecLes | cess | ors | reeves looceeess| cress |sroseors| tosets | streos | LosLr oressert| sLo0r | eso06e TM | Id S| SV] 29D} PO] UZ] DO] IN| 9D} PA | UN] FO] A OY OL 9S | BF] A of st re t€ we Te of ot 8st a ra st vr & wz w 0c or sree | Lesrse | s90ce |19L€L60e| sssorsc |sestse97| ‘os0e Fe [OLLEsece Wt] s | d| ts S| &N sr ut or st +r a It L6ir oc Feors6ssi| ress st | ri900 tT | Loc zsizio6 | 1F69 °N}/ J | O|} N} O eq] IT or 6 8 L 9 r £ TO9TOO'F | P6LOOT ‘¥6L00T °H| H H £ I I SJUSWD]7] OY} JO 9[QVI, MIPOLog