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The Gibbs free energy of the combustion of gas would be negative, as the reaction is exergonic. This is because gas will have more energy than the water and CO2 molecules released after the combustion, and thus the reaction will be spontaneous.
Lauren Huang 1H wrote:Can someone please explain why Gibbs free energy for the combustion of a gas used to heat a BBQ at a pool party is negative? Wouldn't it require be a non-spontaneous process for the combustion to occur?
This question confused me as well. After the test, I realized it was spontaneous because combustion itself is spontaneous, as it releases heat. Yes, the BBQ needs heat, but the heat is provided by the heat released from the combustion reaction.
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