Using Hess's law, what is AHf rxn for the following reaction?NO(G) + O(g) – NO2(9)NO(g) + O3(9) – NO2(9) +O2(9)AH xn = -198.8 kJ/molOg(9) – 3/2 02(9)AHrxn = -142.2 kJ/mol02(9) → 20(9)AHPrxn = +498.8 kJ/mol-839.8 kJ/mol-306.0 kJ/mol394.9 kJ/mol157.9 kJ/molO 442.3 kJ/molQUESTION 8Octane (C3H18) undergoes combustion according to the following thermochemical equation.2C8H18() + 2502(g) – 16CO2(g) + 18H20() AH°rxn = -1.0940 x 104KJ/molWhat is the standard enthalpy of formation of liquid octane?AH°{(CO2(g)) = -393.5 kJ/mol and AH°F{H2O(1)) = -285.8 kJ/mol495 kl/molO -250 kJ/mol-495 kJ/mol-10,940. kJ/mol-2188 kJ/mol

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Using Hess's law, what is AHf rxn for the following reaction? NO(G) + O(9) → NO2(9) NO(g) + O3(9) – NO2(9) +O2(9) Afrxn = -198.8 kJ/mol O3(9) → 3/2 02(9) Afxn = -142.2 kJ/mol 02(9) → 20(9) AH xn = +498.8 kJ/mol O -839.8 kJ/mol -306.0 kl/mol 394.9 kJ/mol 157.9 kl/mol O 442.3 kJ/mol

Using Hess's law, what is AHf rxn for the following reaction? NO(G) + O(9) → NO2(9) NO(g) + O3(9) – NO2(9) +O2(9) Afrxn = -198.8 kJ/mol O3(9) → 3/2 02(9) Afxn = -142.2 kJ/mol 02(9) → 20(9) AH xn = +498.8 kJ/mol O -839.8 kJ/mol -306.0 kl/mol 394.9 kJ/mol 157.9 kl/mol O 442.3 kJ/mol

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Using Hess's law, what is AHf rxn for the following reaction?
NO(G) + O(g) – NO2(9)
NO(g) + O3(9) – NO2(9) +O2(9)
AH xn = -198.8 kJ/mol
Og(9) – 3/2 02(9)
AHrxn = -142.2 kJ/mol
02(9) → 20(9)
AH
Prxn = +498.8 kJ/mol
-839.8 kJ/mol
-306.0 kJ/mol
394.9 kJ/mol
157.9 kJ/mol
O 442.3 kJ/mol
QUESTION 8
Octane (C3H18) undergoes combustion according to the following thermochemical equation.
2C8H18() + 2502(g) – 16CO2(g) + 18H20() AH°rxn = -1.0940 x 104KJ/mol
What is the standard enthalpy of formation of liquid octane?
AH°{(CO2(g)) = -393.5 kJ/mol and AH°F{H2O(1)) = -285.8 kJ/mol
495 kl/mol
O -250 kJ/mol
-495 kJ/mol
-10,940. kJ/mol
-2188 kJ/mol

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