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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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fisher 2012 fisher 2012
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11 years ago
For the combustion of butane and oxygen:

Which statement about this reaction is not correct?

a. If the reverse reaction occurred, it would violate the first law of thermodynamics.
b. The reverse reaction requires a lot of energy and is, therefore, a nonspontaneous reaction.
c. The first law of thermodynamics applies to any related forward and reverse reactions.

i do not understand how the first law of thermo applies here, and the first law is in 2 of the answer choices
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#1
11 years ago
I can't answer this for you, but I would suggest you google thermodynamics and then look for the laws of such.  That may at least explain the question for you.

I have an oxybutane torch that I us on plastics, and the mix is more butane at first, but ends up mostly oxygen when I want it very very hot.  But I'm sure not a science major.

Some place else you may ask, is a welding supply store, they do know how gases interact in a flammable situation
wrote...
#2
11 years ago
The forward reaction is very exothermic (that's why it is used for burning.

The reverse reaction would require a huge amount of heat.

So I would go with b
wrote...
#3
11 years ago
seems to me that you answered your own question. if you dont think the first law of thermodynamics applies then you should pick b.
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