18. The equation for the thermite reaction is shown below. When 2.7 g of aluminum is reacted with excess iron(III) oxide, 42.6 kJ are released. What is the enthalpy change for the reaction? Fe2O3(s) + 2 Al(s) Al2O3(s) + 2 Fe(s) a. -430 kJ b. -850 kJ c. -4.3 kJ d. -8.50 kJ

18. The equation for the thermite reaction is shown below. When 2.7 g of aluminum is reacted with excess iron(III) oxide, 42.6 kJ are released. What is the enthalpy change for the reaction? Fe2O3(s) + 2 Al(s) Al2O3(s) + 2 Fe(s) a. -430 kJ b. -850 kJ c. -4.3 kJ d. -8.50 kJ

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

The equation for the thermite reaction is shown below. When 2.7 g of aluminum is reacted with excess iron(III) oxide, 42.6 kJ are released. What is the enthalpy change for the reaction?

\[ \text{Fe}_2\text{O}_3(s) + 2 \text{Al}(s) \rightarrow \text{Al}_2\text{O}_3(s) + 2 \text{Fe}(s) \]

a. -430 kJ
b. -850 kJ
c. -4.3 kJ
d. -8.50 kJ

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