Question

enthalpy of combustion explain with eqation

Answer 1

Standard Enthalpy of Combustion: ΔHθc,298. Standard enthalpy of combustion is defined as the enthalpy change when 1 mole of a compound is completely burnt in oxygen gas at 298K and 1 bar pressure.

Answer 2

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Standard enthalpy combustion is defined as the enthalpy change when one mole of a compound is formed from its elements in their most stable state of aggregation ( stable state of aggregation of temperature is 298.15k, and presure is 1atm )
For example:- Formation of methane from carbon and hydrogen atoms.

usually combustion of all hydrocarbon finally forms carbon dioxide gas and water vapour. The incomplete combustion occurs in the limited supply of oxygen. It forms hazardous products like carbon monoxide gas and water vapour. combustion is an exothermic reaction which release large amount of energy. This energy change is called as the enthalpy of combustion. The combustible substance wood and other many comman items are organic because they are composed of C,H,and O . An essential condition of combustion process is candle, in which flame can only burn in the presence of oxygen.

2Mg + CO2CO2 ---→→ 2MgO

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