Give explanation steps wise.
Answers
Answer:
Combustion is a high temperature exothermic chemical reaction involving a hydrocarbon or organic molecule reacting with oxygen to give carbon dioxide, water and evolution of heat. For example, the combustion of carbon can be expressed as:
C(s) + O2(g)→CO2(g)C(s) + O2(g)→CO2(g)
The change in enthalpy when one mole of a substance undergoes complete combustion is termed as enthalpy of combustion.
Complete step by step answer:
We need to find out the number of oxygen molecules required for the complete combustion of ethane.
By complete combustion, it is meant that the reactants burn in oxygen and gives a limited number of products. The complete combustion of a hydrocarbon or when a hydrocarbon burns in oxygen, carbon dioxide and water are the main products. When elements are burned, the combustion reaction gives their most common oxides as the primary products.
Ethane is a hydrocarbon having the formula C6H6C6H6 and so its combustion will give carbon dioxide and water. The complete combustion reaction for ethane is : 2C6H6 + 7O2→4CO2 + 6H2O + energy2C6H6 + 7O2→4CO2 + 6H2O + energy
Thus, it can be seen that 7 molecules of oxygen are required for the complete combustion of 2 molecules of ethane. Hence, 7272 molecules of oxygen are required for the complete combustion of 1 molecule of ethane.