I am having trouble with Part B. Please help, thank you ± Problem 9.127 with fee

Question

I am having trouble with Part B. Please help, thank you

± Problem 9.127 with feedback Part B Calculate G° at 294° C. Vinyl chloride (H2C- CHCl (Figure 1)), the starting material used in the industrial preparation of poly(vinyl chloride), is prepared by a two-step process that begins with the reaction of Cl2 with ethylene to yield 1,2- dichloroethane as follows Express the free energy in kilojoules to four significant digits. CH,(g) +CiCH.caan C12 (g) + H2C= CH2 (g) ClCH2 CH2 Cl (1) IdC- kJ Submit My Answers Give Up You may want to reference ( pages 340- 343) Section 9.13 while completing this problem Incorrect; Try Again

Explanation / Answer

B)
Ho = -217.5 KJ/mol
So = -233.9 J/mol.K
= -0.2339 KJ/mol.K
T= 294.0 oC
= (294.0+273) K
= 567 K

use:
Go = Ho - T*So
Go = -217.5 - 567.0 * -0.2339
Go = -84.88 KJ
Answer: -84.88 KJ

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