Respuesta :
Heat=−1.38×10^3kJ
How much heat is released when 25.0 g of methane burns in excess O₂ to form gaseous CO₂ and H₂O?
Evaluation of the heat produced
moles of Methane = given mass/molar mass
moles of Methane = given mass/molar mass
=25g/16g/mol
=1.56mol.
Methane has a heat capacity of -880 kJ/mol.
As a result, the heat released is provided by:
Heat = Mols of Methane x Heat of Combustion
Heat = Mols of Methane x Heat of Combustion =
=1.56 Mol x (-880 kJ/mol)
Heat=−1.38×10^3kJ
Exothermic activity is indicated by a negative sign.
Define the Exothermic process.
The word "exothermic process" in thermodynamics refers to a process or reaction that transfers energy from the system to its surroundings, typically in the form of heat but also in the form of light, electricity, or sound (e.g., a spark, flame, or flash) (e.g. explosion heard when burning hydrogen).
Learn more about the Exothermic process here:-
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