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From this given value of Kc:
2H2S (g) <-------> 2H2 + S2 Kc=2.3 X 10-4 at 1404K
What is Kc for:
H2 + 1/2S2 <--------> H2S
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- The qrxn was -332 cal. What is this in kcal? Use the equivalence of 1 kcal = 1000 cal and dimensional analysis to solve. O a. -332 cal x 1000 cal 332000 kcal %3D 1 kcal 1 kcal 1000 cal Ob. -332 cal x 0.332 kcal 1 kcal 1000 cal C. -332 cal x = -0.332 kcal d. -332 cal x 1000 cal 332000 kcal %3D 1 kcal The heat of the reaction, AH,rxn, is found by dividing the qrxn by the moles of zinc used, nzn- AH xn %3D nzn What is the AH,xn if qrxn = -0.332 kcal and n = 0.0084 moles? O a. 40 kcal/mol O b. 40 cal/mol O c. -40. kcal/mol4. What is the AH° value for the decomposition of sodium chlorate, given the following information?- 2 NaCiO3 (s)_> 2 NaC1 (s) + 3 O2 (g)- (AHP values: NaC1O3 (s) = -85.7 kcal/mol; NaCl (s) O kcal/mol)- = -98.2 kcal/mol; O2 (g)AH = - 1.2 kcal/mol; Kp = 16 nM ОН 1 HO AH = - 6.0 kcal/mol; Kp = 76 nM OH 2 AH = - 5.5 kcal/mol; Kp = 0.5 nM OH 3 (i) What is the difference among 1, 2, and 3?
- For the next reaction: CH,C(ac) + OH-(ac) + CHOH(ac) + C-(ac) ac = acuoso AH =- 18 kcal/ mol AS +13 cal/ mol a) Determinate the value of Kc of that reaction reaching the balance at 25'C b) Explain why AS is positive despite there are the same number of moles in the reactive and the product.1.4 4 (a) Calculate the value of Kc for the reaction: PC13 (g) + Cl₂ (8) PC15 (8) Given that when 8.4 mol of PC15 (g) AH = Positive Kc = is mixed with 1.8 mol of PC13 (g) and allowed to come to equilibrium in a 10 dm³ container the amount of PC1, at equilibrium is 7.2 mol. ¹5 (g) (b) Explain the effect of the following changes below on the value of Kc: (i) Increasing temperature (ii) Lowering the concentration of chlorine (C1₂) (iii) Addition of a catalystf) 엿 1- 2- H+ Br 3- Ht, H2O 1-O3, CH2Cl2, -78 °C 2- CH3SCH3 CgH1402
- For the following organic reaction identify the mystery reactant R, its stoichiometric coefficient N, and any other substance X that must be present. CH3 T CH₂= =C-C-CH=CH₂ || CH₂ Chemical formula of R: Stoichiometric coefficient N: + N R Must any other substance X be present? X CH3 -CH-CH₂ - CH3 I CH3 CH3-CH- If you said an additional substance X must be present, enter its chemical symbol or formula: 0 1 0 yes no X ŚGiven: 2CO2(g) co(g) + O2{g) ; Kc= 26, N2(g) + 3H2(g) 2NH3(g); Кс- 2 х 10-5, determine the Kc value for: a) CO2(g) CO(g) + ½ 02(g) b) 2NH3(g) N2(g) + 3H2(g)6. _(6a)_ 2CUSO4. + 4NaOH » CH:COOH ±_(6b)__ + 2NA2SO4 + HzO