Octane (CgH18) is a component of gasoline and combusted according to the reactionbelow. Is the reaction exothermic or endothermic and what is the change in heat energy if34.5 g of octane is combusted with excess oxygen? (Note: the molar mass of octane is114.2 g/mol)2C3H18 (1) + 2502 (g) → 16CO2 (g) + 18H2O (g) AH= -10860 kJendothermic, -3280 kJexothermic, -10860 kJO exothermic, -3280 kJO endothermic, -1640 kJexothermic, -1640 kJdfjournal.part3 (1).docxjournal.part3.docxto search

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ane (C8H18) is a component of gasoline and combusted ac

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

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Stoichiometry

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Question

Octane (CgH18) is a component of gasoline and combusted according to the reaction
below. Is the reaction exothermic or endothermic and what is the change in heat energy if
34.5 g of octane is combusted with excess oxygen? (Note: the molar mass of octane is
114.2 g/mol)
2C3H18 (1) + 2502 (g) → 16CO2 (g) + 18H2O (g) AH= -10860 kJ
endothermic, -3280 kJ
exothermic, -10860 kJ
O exothermic, -3280 kJ
O endothermic, -1640 kJ
exothermic, -1640 kJ
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