Question

Arrange the following gases in order of decreasing standard molar entropy: N204(9), NO(g), NO2(g). Select one: O a. N204> NO > NOZ O b. N204 > NO2 > NO O C. NO2 > NO > N20. O d. NO > NO2 > N204 e. NO > N204 > NO2

Answer 1

role. Arrange the following gases in order of decreasing Standard molar entropy: 1204 cg), nocg), NO₂ cg). Select one in a a) N204 NOYNO2 6) N2O4Y MOLYNO c) NOZY NOYN2O4 d) Noy NO2YN204 e) Noy N2O4Y NO2 An Entropy of a molecule increasino increases with increasing complexity of the molecule. - Strencture of M204 G - N - N - 02 ö=N-0: – Strencture of Mo, N=6 - Structure of no molecully. 1. order of complexity & e of the NO <NO₂CM₂04

Standared entropy of N₂O4 = 304.4 kmale Accord equa Standered enfreopy of No₂ = 240.0 J/K male Standard endreoty of no = 210.8J/K male temt nun It II. The order of of the gosen decreasing han malare entropy an N204) No₂7 No.– option (6) is right 1 on He The the MO Which of the following reactions will Shift to the left if the volume in. decreased ? af H₂ (g) + Cl2(g) 2 Hecg). 67 2503 (9) — 2502 cg) + O2(g) 7 2A I CG) - H₂(g) + I2Cg) dy N2(g) + 3H₂(g) + 2NH3 Cg) Ansi If the total volume of the reactants. is stan smaller than the total volume of sereto preoducts then the reaction will shift to the left in the volume in decreased je more preoduct will Converted into reactants. Son Here r. No th CTE

Ik mole Ik male According to Avogadro's hypothesis: - equal volumes of all gases, at the same temperature and pressure, have the same number of molecules e male It means, one male has same volume at and pressure. of different gay constant temperaturze ndroby is right a H₂ (g) + Cl₂(g) = 21Hclcg) y will - stoon sum of 1 smole of H₂ gas and I'm gans will react to give 22 moles of Hel. The volume of a reactants in equal to the volume of the product. No volume change is Obserred on going from left to right of the reaction. so no Shifting of direction of reaction is obserred. by 2503 (g) 2502 (g) + O₂(g). Here, & moles of Soz decomposes to give 2 moles of so, and 1 mole of Oz s. Volume of the reactant is lower than the total volume of the producto CI volume is decreased, then the reaction is shifted to toward left. ants alume ction olume will

HIG) - H₂ cg) + t2cg). 37 Whate CHANE and 2 moles of HI s decompaged to give 1 mole al H and 1 mole of tz C. The volume of the reactant se the sum of the volume of the preoduch. 6) + c) + 1 e) + so no change of direction reaction is observed here if decreased. of volume is. AMI- Acce . Here, (d) N2(g) + 3 H₂ (g) 2NH3c g) 1 mole of N2 and 3 mole of H₂ gars will noare react to give a moles of NH3 sum of in The volume of the reactants is higher than the totood total volume of the product. . If solume is decreased the reaction will shifted toward right. 5. Reaction (6) - 230₂c9 2 502cg1+0₂cg). Will shifts to the left it the volume is decreased.

re al to a whate in the 4G rexn Fore HONcg) + 2H₂CG) . CH3NH₂ cg) at 417K if sho= - 158.0ky and 45° = - 219.9 J/K? a) – 66.3k] 6) + 66.3k] C) + 61.9ky d) – 250k] e) +250 kJ According to the laws of their molynamies, 100 = 4H - TASO ducts. Ama will NH3 igher a Here AH = - 158.0k7 = - 158x103) A5 - - 219.9 J/K T = 417 A Girtern =1-158000 +(219.9x417)77 - – 66301.7 - – 66.3oky r. Acirexm = -66.30kg reyn tion

Summery 17 Endreoby of molecules increases with increasing complexity of the molecules 27 It the number of males of reacts is total higher than the product, then according to Avogadro's hypothesis, the reacty will occupy higher volume than the preoducts As a result, if the volumen decreased the reeaction will shifted towared right direaction and vice versa. 37 A Giren = 4H - TASO