Question

13. Under certain conditions, methane reacts with steam to give carbon monoxide and hydrogen gas. CHace + H20 - CO(+ 3 H2(8) a) A chamber is pressurized with 30.0 bar of CH4 and 30.0 bar of H20. At 654 °C, K for this reaction is 0.389. What is the equilibrium partial pressure of the other two gases? (You may find an ice table useful but not necessary.) 131 b) If the chamber is pressurized with 2.00 bar of each of the four gases at 654 °C. what direction must the reaction shift to reach equilibrium. [2] 14. Consider the Sn2 mechanism below and answer the following true/false questions. 171 HHH H-0 Br: - HO- -Br HO a) The SX2 mechanism involves two steps. b) The S2 mechanism involves a five-coordinate intermediate at the centre c) The SX2 mechanism involves breaking a bond in the electrophile. d) Alcaving group is lost from the nucleophile in an S2 reaction. e) The 8 atom in the nucleophile forms a new bond. 1) The reaction rate depends on the concentration of the nucleophile B) The primary alkyl halide exhibits the fastest reactivity towards S2 mechanisms. TF TF TF TF TF TF TF

30bar?

Answer 1

Answer is given in image
Insines Given Reactions at 654°C CH4, 6+ 112019, = com +3H2O). Initially 30 30 0 0 Partial pressure 306 30-6 l 3p. atcequilitriem but te- Páox kr aquilibrium) Pelux PHO og Þ (3b)3 2764 0-389 = (30-13? (30-62. (30-1) - 5%80-by? = 93.09 - 1.44X10-2 or $2_o 1.2x10-10 1092=60-b) 1-2 => 100$+ 12b-360 = 0 solving we get p= 1.84 bar. partial pressure of co . Po = 1.84 bar. Aus P = 341.84 = 5.52 bar. @ H2 ΗΣ An 6. Naw giren Pro= 2.0 bar, P42 = 2:0 bar. CH₂ = 2-0 ber PH₂O = 2.0 bar a kp = (2) (2) 5 => kg = 4(21) say so Qp> kg kp = 0.389. hance Reaction will shift in Backward direction

6 The SN2 mechanism involves two steps .= fal since single step mechanisan. 6. The SN2 mechanism inrolves a fire co-ordinate intermediate at the Sieuthea) false. srice no intermediate formation in SN². @ The S2 mechanism involves breaking a bond in the electrophile - True As Hybri behare of electrophile. 1. A leaving group is lost from the nucleophile in an SN2 reaction - True H Br is lost by -oh 6. The grafom in the sucheophile froms a near band True as in Hof- o forms a new bondfint product B. The reaction sate depends on the concentration of the nucleofhite True. As, Rate = [CH3-Br] [OH-] 9. The primary alty halide exhibits the fastest reactivity towards S2 mechanisma Tome oder is 7>2>3" for SpRY