Question

please show work for these problems, correct answers are circled

18. Consider the following equilibrium: Clip) + 2NO) = 2NOCK If 12.0 moles of Cly, 10.24 moles of NO and 2.00 moles NOCI are placed in a 2.00 L container and the system moves to the right to get to equilibrium If there are 100 moles NOCI acquilibrium, calculate the key A 0.006 B5.58 19. What will cause the value of key for an exothermic reaction to decrease? A increasing the pressure B. increasing the temperature C. decreasing the temperature D. decreasing the surface area 20. Consider the following: H2(g) + Big) = 2H1) Initially, some HI is placed into a LOL container. At equilibrium there are 0.010 mol H, 0.010 molly and 0.070 mol Hl present. How many moles of HI were initially added to the container 0.0 mol B 0070 mal C 0.080 mol D. 0,090 mal 21. Consider the following equilibrium: 3NO2(g) = N Oss) + NOP Initially, some NO, N2Os and NO were placed in a container and allowed to reach equilibrium When equilibrium was established, it was found that the pressure had increased Which of the following explains what happened? A Trial Key > Keg so the system shifted left. B Trial Keg Keg so the system shifted left C. Trial Key > Keq so the system shifted right. D. Trial Keg<Keg so the system shifted right 22. Consider the following equilibrium: 3NOx) = N2O5) + NO Initially, 8.00 moles NO, were placed in a 2.0 L container and allowed to reach equilibrium The equilibrium concentration of NO was 1.10 M. Calculate the key A 1.7 B 1.9 C 3.5 0050 D 23. Consider the following equilibrium: 3NO2) NO -NOIT At a different temperature, 4.00 M NO, were placed in a 2.0 L container and allowed to reach equilibrium. The equilibrium concentration of NO, was 1.00 M. Cakulate the Keg A 0.11 C D 30 10. 24. Consider the reaction: 2HB) = Hie Bryce) keq - 49.0 If 4.0 M HBr is initially placed into a container, what will be the equilibrium (HBr? A. 0.27 M B 3.7M CS3M D &M 25. Consider the reaction: 2HBrig) = H2 + Brze Koq - 49.0 10.120 M H2, 0.120 M Br2 and 0.01714 M HBr are placed into a container at 440C, which of the following is true as equilibrium is approached? A Brdecreases significantly B H Br decreases significantly C. Ha decreases significantly D. Hl remains the same.

Answer 1

² a + 2NO 12-omoles 10-24 miles 200L 2-00L NOCI 2.00 moles. 2-ool. - 2 x + 2x G 6.com 5-12-22 L-00M + 2x Given toomt 2x 2 (NooD EQUtilorum 10. O moles 2.00L I loom+ 2x 2 sooml 2 X z 200m. Calle 2 6.00 - 2.00 a 4-oom. [NO] ea a 5-12-2(2-00) 21-12m kea? Croc)? 2 [chy) (No)? ka (4.98 [soom)? (4-007 [1.12m] for exothermic reaction, hear acts as product. Increasing the temperature causes backward reaction to takes place So [products & Crectants] ? - Keata [Products) at Creactants & T So increasing the temperatures causes the value of Kea decrease. - Heeg, t 2 2 zur 20) ل ل ام to olo (x) o-olomol to-olo (x) o-olomo? - 2x 2 (-2xo-olom) 0.030 mol E

[HI CHI) + change 20-0300 + 2x 20-070 M +0.ozom -20-090M Here volume is it so moles of HI 2 CHI) moles OF HI Inhala 0-090 moles 3 Noces z Nostatnog 3 moles 2 moles. Here when backward reaction takes place, moles of gas increases When moles of gas increases, pressure increases : - Backward reaction takes place when products are more. az Ina seat [no] (No) Cool - So That Kea kea so the system shifted left (backward 22) 3 NO cg) Z N059) TNO(g) 2 8-pomoles 24-00M 0 0 C -3x tx tx E ? Hom hom here x 2 1.1om Nadea 4.00-341.10m) 2 otom k & CN2G) (No a 10x1-10 Croß (0.2013 23-53 23-5 calculate a, when urs eauad to kea then no chane 25