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- This reaction must have a ∆G<0 at SATP: Xe(g)+F2(g)→XeF2(g) 2Na(s)+Cl2(g)→2NaCl(s) 2NaF(s)+I2(s)→2NaI(s)+F2(g) MgSO4(s)→Mg(s)+S(s)+2O2(g)The formation of products in a gas-phase rxn is affected by A. Amount of reacting molecules B. All C. Number of Collisions D. Orientation of moleculesA+B➡️P t=0 :C(A)=C(B) t=500sec 20% of react t=? Sec 60% of compl
- For which of the following reactions is S° > 0.Choose all that apply. NH4Cl(s) NH3(g) + HCl(g) 2NH3(g) + 3N2O(g) 4N2(g) + 3H2O(g) H2(g) + C2H4(g) C2H6(g) H2CO(g) + O2(g) CO2(g) + H2O(l) C2H2(g) + 4H2O(g) 2CO2(g) + 5H2(g)Consider the following reaction and the data provided.2 HgCl2(aq) + C2O4 2-(aq) ----> 2 Cl-(aq) + 2 CO2(g) + Hg2Cl2(s) Exp# [HgCl2] (M) [C2O42-] (M) Rate (M/s)1 0.164 0.15 3.2 x 10-52 0.164 0.45 2.9 x 10-43 0.082 0.45 1.4 x 10-44 0.246 0.15 4.8 x 10-5 What is the rate law? a) r = k[HgCl2] [C2O42-]2 b) r = k[HgCl2]2 [C2O42-]c) r = k[HgCl2] [C2O42-] d) r = k[HgCl2] [C2O42-]3Prof. Neiman and Prof. James were first to discovered in 1973 that chlorofluorocarbons (CFCs) were depleting the Earth’sozone layer when released into the atmosphere. Once they reach the stratosphere, Clis released from the CFCs molecules by interaction with UV light. Free Cl atoms areable to react with ozone in a catalytic cycle that converts O3into the more stable O2.It is estimated that a single Cl atom is able to react with∼100000 O3molecules.Although CFCs production was banned in 1996, there are still a substantial numberof motor vehicle air conditioners (MVACs) that use CFC-12 (CF2Cl2) as refrigerant.The average CFC-12 emission rate from operating MVACs has been estimated tobe 59.5 mg per hour per vehicle (Zhang et al.Environ. Sci. Technol. Lett.2017).How much chlorine, in kg, is added to the atmosphere in a year due to 100 millionMVACs using CFC-12 as refrigerant?
- Which of the following is a concerted reaction with a ΔG < 0? (Hint: Exergonic reaction)Which reaction is most likely to have a positive ΔSsys?a) SiO2(s) + 3 C(s)¡SiC(s) + 2 CO( g)b) 6 CO2( g) + 6 H2O( g)¡C6H12O6(s) + 6 O2( g)c) CO( g) + Cl2( g)¡COCl2( g)d) 3 NO2( g) + H2O(l )¡2 HNO3(l ) + NO( g)Calculate the ∆0H when 1 mole of methyl alcohol,CH3OH reacts with O2 and the product of reactions is CO2 and H2O. Hint: Create a chemical balance equation first Data : ∆oHf CH3OH = -238.8 Kj/mol ∆oHf CO2 = -393.5Kj/mol ∆oHf H2O = -285.9 Kj/mol Select one: a. -746.1 J b. -546.1J c. -646.1 J d. -846.1 J
- Single Replacment ReactionsThe oxidation of SO2 to SO3 is accelerated by NO2. The reactionproceeds according to:NO2(g) + SO2(g)---> NO(g) + SO3(g)2 NO(g) + O2(g)--->2 NO2(g)(a) Show that, with appropriate coefficients, the two reactionscan be summed to give the overall oxidation of SO2by O2 to give SO3. (b) Do we consider NO2 a catalyst or anintermediate in this reaction? (c) Would you classify NOas a catalyst or as an intermediate? (d) Is this an exampleof homogeneous catalysis or heterogeneous catalysis?For the following reaction 6 experiments have been run and the data collected is in the following table: 2 MnO4-(aq) + 5 H2C2O4 (aq) + 6 H+ (aq) ---> 2 Mn2+ (aq) + 10 CO2 (g) + 8 H2O (l) Experiment [MnO4-], M [H2C2O4], M [H+], M Rate, M/s 1 0.2410 0.3470 0.2690 0.1147 2 0.3260 0.6210 0.2270 0.2776 3 0.5630 0.5740 0.7420 0.4431 4 0.2410 0.3470 0.3840 0.1147 5 0.4140 0.5740 0.5610 0.3258 6 0.3260 0.4930 0.4910 0.2203 a) Find the order of the reaction with respect to H+. _______________ b) Find the order of the reaction with respect to MnO4-. ______________ c) Find the order of the reaction with respect to H2C2O4. _____________ d) What is the overall order of the reaction? ________________________