Secure https:// mast eringchem .COI ProblemID 80660333 session Chem 132-02 Post

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Secure https:// mast eringchem .COI ProblemID 80660333 session Chem 132-02 Post Lecture Homework Chapter 18 Exercise 18.45 Exercise 18.45 Part A Calculate the free energy change for the following reaction at 28 °C. Cs Hs(g) 502 (g) 3CO2 (g) 4H2O(g) 2217 kJ; ASC. AH J/K 10 Express your answer using four significant figures. AG kJ Submit My Answers Give U Part B Is the reaction spontaneous? (Assume that all reactants and products are in their standard states.) O spontaneous O nonspontaneous Submit My Answers Give U Resources previous l 22 of 40 l next ide Feedback Continue

Explanation / Answer

18.45)

A)

H = -2217.0KJ/mol

S = 101.1J/mol.k = 0.1011 KJ/mol.K

T = 28.0 oC =(28.0+ 273) K = 301.0 K

use:

G = H - T*S

G = -2217.0 - 301.0 * 0.1011

G = -2247 KJ/mol

Answer: -2247 KJ/mol

B)

Since G is negative, the reaction is spontaneous

I am allowed to answer only 1 question at a time

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