A combustion reaction will always be associated with a change in entropy that will be positive.
The entropy of a system is the measurement of the disorder of the system which happens in the thermodynamic reaction.
During association the value of entropy will be positive and during dissociation the value will be negative.
During association the number of molecule increases due to which the entropy of the combustion increases and the value will be positive .
Therefore , combustion reaction will always be associated with a change in entropy that will be positive.
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