Here's what that means:
* Enthalpy Change: This refers to the heat energy released or absorbed during a chemical reaction. A negative enthalpy change indicates an exothermic reaction, where heat is released.
* Combustion: This is a chemical process involving the rapid reaction between a substance with an oxidant, usually oxygen, to produce heat and light.
* Standard Conditions: These are defined as 298 K (25 °C) and 1 atm pressure.
* Ethanol: The chemical formula for ethanol is C₂H₅OH.
The balanced chemical equation for the combustion of ethanol is:
C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)
This equation tells us that when one mole of ethanol reacts completely with three moles of oxygen gas, it produces two moles of carbon dioxide and three moles of water. The enthalpy change associated with this reaction is -1367 kJ/mol, meaning that 1367 kJ of heat energy is released for every mole of ethanol burned.
