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Question 22 Acetylene burns according to the following equation. C2H2(g) + 5/2 O2(g) --> 2 CO2(g)...

Question 22 Acetylene burns according to the following equation. C2H2(g) + 5/2 O2(g) --> 2 CO2(g) + H2O(g) \DeltaΔΔHorxn = -1255.8 kJ What is the \DeltaΔΔH for the reaction if 5.50 grams of acetylene (C2H2) burns completely?

-4.38 J

-228 J

-531 J

Correct Answer -265 J

-6910 J

PLEASE SHOW THE WORK SO I CAN UNDERSTAND.

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Answer #1

CH Equation for the combustion of Acetylene : → 2002(g) + H20(8): AH = - 1255.8 kJ Heat released from 5.50g CH,, AH = 5.50g x

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