Answer to Question #27282 in Inorganic Chemistry for faith gituma
According to the chemical equation this combusting reaction is exotermic(the heat is released to the surrounding (+488 kJ)).
But the system is loosing the heat. Enthalpy views the process from the side of the system. That's why it's negative in the exotermic reactions
dH = -488kJ
Answer: dH = -488 kJ
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