What is the net energy exchange for the combustion of ethyne? Show your work. Based on the net energy exchange, is the process endothermic or exothermic?

In order:

Write the lewis dot diagram for ethanol C2H6O
Write the balanced equation for the combustion of ethyne C2H2 (see p. 421 in textbook)
What is the net energy exchange for the combustion of ethyne? Show your work.
Based on the net energy exchange, is the process endothermic or exothermic?

1 Answer
anor277
May 15, 2018

We could even email your home work in directly for you...

Explanation:

You gots #H_3C-CH_2OH#...each carbon has four bonds, oxygen has 2 (and two lone pairs)...the hydrogens are all singly bound...

For the combustion of acetylene, the normal rigmarole is to (i) balance the carbons as carbon dioxide; (ii) balance the hydrogens as water; and (iii) balance the oxygens...

#HC-=CH(g) + 5/2O_2(g) rarr 2CO_2(g) + H_2O(l)#

You will have to quote the net energy exchange for acetylene, whatever that is...certainly the combustion reaction is exothermic, and its energy output could be precisely measured...

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