Use the series of reactions that follow: Express your answer with appropriate un

Question

Use the series of reactions that follow:

Express your answer with appropriate units.

Please answer all parts! Thank you!

Interactive Activity-Applications of Hess's Law button within the activity, and analyze the relationship between the two reactions that are displayed. The reaction that was on the screen when you started and its derivative demonstrate that the change in enthalpy tor a reaction. Delta H. is an extensive property. Using this property, calculate the change in enthalpy for Reaction 2. Express your answer to four significant figures and Include the appropriate units. Click on the button within the activity and analyze the relationship between the two reactions that are displayed. The reaction that was on the screen when you started and Its derivative demonstrate that the reaction enthalpy. Delta H, changes sign when a process is reversed. Consider the reaction What will Delta H be for the reaction If It Is reversed?

Explanation / Answer

part A)

delta H = 3 x -2043 KJ = -6129 KJ

part B)

delta H = - 44 KJ

C) CH4(g)+2O2(g)?CO2(g)+2H2O(l)

CH4 ----> C + 2H2 .........delta H = 74.8 KJ

C + O2 ----> CO2 ............delta H = -393.5 KJ

2H2 + O2 -----> 2H2O(g) ....delta H = -484 KJ

2H2O (g) -----> 2H2O (l) ........delta H = -44x2 = -88 KJ

reaction 1 and 4 are reversed from their original order to get the desired reaction

Add the above four reactions to get

CH4(g)+2O2(g)-------->CO2(g)+2H2O(l)

delta H = 74.8 - 393.5 -484 - 88 = -890.7 KJ

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