hemistry: HW Set 18b-Google Chrome Secure I https//session.masteringchemistry.co

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hemistry: HW Set 18b-Google Chrome Secure I https//session.masteringchemistry.com/myct/itemView?assignmentProblemID-939266088koffset-next Set 18b Exercise 18 77 ercise 18.77 Part A Estimate the value of the equilibrium constant at 525 K for each of the following reactions. 200(g) +02() 2C02(a) Express your answer to three significant figures. Submit My Answers Give Up Part B 2H2S(9)- 2H2 (g) + S2 (g) Express your answer to three significant figures K1.5 10 -31 Submit My Answers Give Up Incorrect; Try Again; 4 attempts remaining O Type here to search

Explanation / Answer

part A

2CO(g) + O2(g) <====> 2co2(g)

dG0 = (2*-394.38)-(2*-137.28+1*0)

      = -514.2 Kj

DG0 = -RTlnK

-514.2*10^3 = - 8.314*525lnk

k = 1.45*10^51

part B

2H2S(g) <===> 2H2(g) + S2(g)

DG0 = (1*0+1*80.08)-(2*-33.05)

     = 146.18 kj

DG0 = -RTlnK

146.18*10^3 = -8.314*525lnk

k = 2.85*10^-15

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