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Heat is required to make the reaction occur.

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13y ago

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Is the reaction endothermic or exothermic, and what is the enthalpy of the reaction?

The reaction is exothermic, meaning it releases heat. The enthalpy of the reaction is negative, indicating that it is exothermic.


Is vaporisation an exothermic or endothermic process?

Any reaction categories into exothermic and endothermic based upon change in enthalpy of reaction. If difference in enthalpy of product and reactant comes positive value then it is termed as endothermic and if it is negative value then exothermic reaction. Usually, vaporisation is considered as exothermic due to release in energy.


What is true of the enthalpy reaction?

The enthalpy of a reaction is a measure of the heat energy exchanged with the surroundings at constant pressure. A negative enthalpy change indicates an exothermic reaction, where heat is released. A positive enthalpy change indicates an endothermic reaction, where heat is absorbed.


What does it mean if the change in enthalpy value for a chemical reaction is positive?

A positive change in enthalpy for a chemical reaction indicates that the reaction is endothermic, meaning it absorbs heat from its surroundings. This typically results in the surroundings feeling cooler.


How do you know if an enthalpy change diagram is endothermic or exothermic?

If you plot the reaction coordinate (what I think you mean by "enthalpy change diagram"), the reaction will be exothermic if the products are lower on the graph than the reactants. If they are higher than it is endothermic. For instance, if you go to the linked Wikipedia page (link to the left of this answer), the graph shown is of an exothermic reaction.


Which is true of the enthalpy of a reaction?

Its value does not depend on which reactions are added.


What is process that involves absorption of heat?

endothermic reaction a positive enthalpy.


What is the enthalpy of reaction apex's?

The enthalpy of reaction, denoted as ΔH, is the heat absorbed or released during a chemical reaction. It is specific to each reaction and can be positive (endothermic) or negative (exothermic). The value of enthalpy of reaction for a specific reaction can be calculated experimentally or using thermodynamic data.


What is the difference between the enthalpy of the products and the enthalpy of the reactants in a chemical reaction?

The difference between the enthalpy of the products and the enthalpy of the reactants in a chemical reaction is known as the change in enthalpy, or H. This value represents the amount of heat energy either absorbed or released during the reaction. If H is positive, the reaction is endothermic and absorbs heat. If H is negative, the reaction is exothermic and releases heat.


What kind of enthalpy change favors a spontaneous reaction?

For a spontaneous reaction, the overall change in enthalpy should be negative (exothermic). This means that the products have a lower enthalpy than the reactants, releasing energy in the form of heat.


What does a negative enthalpy indicate in a chemical reaction?

A negative enthalpy in a chemical reaction indicates that the reaction is exothermic, meaning it releases heat energy to the surroundings.


Is a positive enthalpy change indicative of an endothermic reaction?

Yes, a positive enthalpy change is indicative of an endothermic reaction.