Question

Part I. (3 pt for each. No need to show calculation or explanation.) 1. The thermochemical equation for the formation of ammonia from elemental nitrogen and hydrogen is as follows: N:(g) + 3 H:(8) = 2 NH3(g) AH--92.2 kJ Given a system that is initially at equilibrium, which of the following actions cause the reaction to proceed to the left? a) adding N2(g) b) removing NH3(8) c) removing H:(8) d) decreasing the temperature e) adding a catalyst H C CH3 acetone 2. List all the intermolecular forces present in pure acetone. a) hydrogen bonding only b) dipole-dipole force only c) hydrogen bonding, dipole-induced dipole and induced dipole/induced dipole forces d) dipole-dipole, dipole-induced dipole, and induced dipole/induced dipole forces e) hydrogen bonding, dipole-dipole, dipole-induced dipole and induced dipole/induced dipole forces 3. Which of the following molecules will have the highest boiling point? a) N b) F c) O d) CS, e) CHE 4. Assuming ideal behavior, which of the following aqueous solutions should have the lowest freezing point? a) 0.75 m NaCl (electrolyte) b) 1.00 m LiBr (electrolyte) c) 0.50 m Ca(NO3), (electrolyte) d) 0.75 m K SO. (electrolyte) e) 1.25 m C.HO. (non-electrolyte)

Answer 1

given" 0.45-3n = pels 3n=o. 30 n=0.10 24 +3 B 24+4 E inhi 0.6 0.45 0.5 Ater: 0.6-22 045-34 an ostm .:[E]=0.5taxo.lo = 0.9M Anale N₂ + 342 = 2013 Du=-na remoning H₂ leads to the shifting of the equilibrium to the left side dipol-dipolena I cy - Ctah force only timur s=cos N2 F - 02 C2Hq non polary non polar non polar nompalar ) polar ④ No. of sonst freezing I Af = ikfm k₂504 - 2K+ + 3501" 5 12 13 An. (a) 0.75m k₂so a faceezing min Point 6 N₂O + No N21000 No + 1 OR N20 N2 + 1/ 202 suerall balanced rum. An! 3only , For weak acid pu= 1 (Pka-lose) PHE 4.6-0.55 Pkq= 4.05 [Ka= 8.911105 2-30 = 1 (pka - logo:28) pka = 4.6 tlog 0.28 Any