Make up 1-solutions - Version 078 Make up 1 laude(51635 Q Denitions[C]c[D]d[A]a[B]b G H TS Kw[H[OH pH log[H 104 Pressure bar This print-out should have

Make up 1-solutions - Version 078 Make up 1 laude(51635 Q...

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Version 078 – Make up 1 – laude – (51635) 1 This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Constants R = 8 . 314 JK - 1 mol - 1 Definitions Q [C] c [D] d [A] a [B] b G H - TS K w [H + ][OH - ] pH ≡ - log [H + ] pOH ≡ - log [OH - ] Equations Δ G = Δ H - T Δ S ln P 2 P 1 = Δ H vap R 1 T 1 - 1 T 2 Π = MRT Δ T b = iK b m Δ T f = iK f m P i = P i χ i P = i P i q = mc Δ T q = m Δ H Δ G = - RT ln K K = e - Δ G RT ln K 2 K 1 = Δ H R 1 T 1 - 1 T 2 Q = K [at equil.] [H + ] = ( K a C a ) 1 / 2 [OH - ] = ( K b C b)1/2Rank the following liquids in increasingorder of solubility in water (H2O): [H + ] = K a ( C a /C b ) pH = p K a + log( C b /C a ) [OH - ] = K b ( C b /C a ) pOH = p K b + log( C a /C b ) 001 6.0 points Which line segments ( x , y and z ) corre- spond to sublimation/deposition and vapor- ization/condensation, respectively? Carbon Dioxide x y z 200 250 300 350 400 10 0 10 1 10 2 10 3 10 4 Pressure, bar Temperature, K 1. x and y correct 2. y and x 3. not enough information 4. z and x 5. y and z 6. x and z 7. z and y Explanation: Sublimation/deposition occurs at the solid-gas phase boundary, and vaporiza- tion/condensation occurs at the liquid-gas phase boundary 002 6.0 points CH 3 F, (CH 3 ) 2 NH, CH 3 Cl, CBr 4 . 1. CH 3 Cl < CH 3 F < (CH 3 ) 2 NH < CBr 4 2. CH 3 F < (CH 3 ) 2 NH < CBr 4 < CH 3 Cl 3. (CH 3 ) 2 NH < CBr 4 < CH 3 Cl < CH 3 F 4. CBr 4 < CH 3 Cl < CH 3 F < (CH 3 ) 2 NH correct
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Version 078 – Make up 1 – laude – (51635) 2 Explanation: 0036.0 pointsWhat would be molar solubility of a very ex-pensive salt, awesomium, which is composedof 3 cations and 2 anion (X3Y2) and whoseKspis 0.00108? 1. 1.55 kcal correct 2. 155 cal 3. 61.5 kcal 4. 6150 cal 5. 15.5 cal Explanation: 10 g H 2 0 C step 1 -→ 10 g H C step 2 -→ 10 g H
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