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October 2017, Week 4

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Subject:
FW: MCAT Question of the Day | Next Step Test Preparation
From:
Kemile A Jackson <[log in to unmask]>
Date:
Mon, 23 Oct 2017 14:14:11 +0000
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[Interesting Image]

MCAT Question of the Day



The combustion of octane is a common reaction in automobile engines.



1) 2 C8H18 (l) + 25 O2 (g) à 16 CO2 (g) + 18 H2O (g) ΔH1 = -250 kJ/mole



2) 18 H2O (l) à 18 H2O (g) ΔH2 = 88 kJ/mole



Net Reaction:



3) 2 C8H18 (l) + 25 O2 (g) à 16 CO2 (g) + 18 H2O (l) ΔH3 = ?







Given ΔH1 and ΔH2, what is ΔH3 for the net reaction above?



A. 163 kJ/mole



B. -163 kJ/mole



C. 333 kJ/mole



D. -333 kJ/mole





[MCAT Answer]<https://rd150.infusionsoft.com/app/linkClick/35654/2cdff6aa01c9a698/14643437/dbbed19c20367aa1>

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