Problem: Liquid propane in the tank, C3H8, vaporizes and mixes with air as it escapes through the nozzle. The combustion reaction of C3H8 and O2 produces a blue flame.Does this reaction produce or consume thermal energy (heat)?

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What we have is a combustion reaction.

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Problem Details

A photograph shows a blue flame coming from the nozzle of a propane tank.

Liquid propane in the tank, C3H8, vaporizes and mixes with air as it escapes through the nozzle. The combustion reaction of C3H8 and O2 produces a blue flame.

Does this reaction produce or consume thermal energy (heat)?

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What scientific concept do you need to know in order to solve this problem?

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