Question

The combustion of ethane (C2H6) is represented by the equation:
2C2H6(g) + 7O2(g)  4CO2(g) + 6H2O(l)
What type of reaction is this?
A. Exothermic reaction.
B. Endothermic reaction
C. Both A and B
D. None of the above

Answer 1

Answer:

the combustion of ethane is an exothermic reaction

Answer 2

Answer:

The combustion of ethane is an exothermic reaction.

Explanation:

If the enthalpy of the formation of product is lesser than the enthalpy of formation of reactants, the reaction occurs with the evolution of heat. Such a reaction where heat is liberated out is called an exothermic reaction. The change in enthalpy for the exothermic reaction is negative.

If the enthalpy of the formation of reactant is lesser than the enthalpy of formation of product, the reaction occurs with the absorption of heat i.e endothermic reaction. The change in enthalpy for the exothermic reaction is positive.

Combustion is an exothermic process as it releases heat energy. Thus, the combustion of ethane is an exothermic reaction.