Question

C₂H₅0H+30₂→2CO₂+3H₂0,the change of enthalpy was ΔH= - 1235.7 KJ/mol

Was heat lost or gained in the reaction
How do you know

Answer 1

The total enthalpy of the reaction has negative value which mean that the heat is lost during the chemical reaction into surroundings.

Step-by-step explanation:

Exothermic reactions are defined as the reactions in which energy of reactants is more than the energy of the products. In these reactions, energy is released by the system.

The total enthalpy of the reaction
`(\Delta H)` comes out to be negative.

Endothermic reactions are defined as the reactions in which energy of products is more than the energy of the reactants. In these reactions, energy is absorbed by the system.

The total enthalpy of the reaction
`(\Delta H)` comes out to be positive.

`C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O`,ΔH= -1235.7 kJ/mol

The total enthalpy of the reaction has negative value which mean that the heat is lost during the chemical reaction into surroundings.