# How can you tell if a graph is endothermic or exothermic?

## How can you tell if a graph is endothermic or exothermic?

In the energy level diagram, the enthalpies of the products are lower than that of the reactants. Hence, the enthalpy change is negative (ΔH<0). By examining this enthalpy change, one can tell whether a reaction is endothermic (ΔH>0) or exothermic (ΔH<0).

### What is the difference between exothermic and endothermic reaction?

In an easy way, the endothermic reactions absorb energy from the surrounding, which is in the form of heat. Whereas, an exothermic reaction releases the energy into the surrounding of the system.

What chemical reactions are endothermic?

An endothermic process is any process which requires or absorbs energy from its surroundings, usually in the form of heat. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes.

What are some examples of exothermic reactions?

Another simple example of an exothermic reaction is combustion, such as lighting a candle. An initial input of energy causes oxygen and wax react to produce carbon dioxide, water, and heat.

## What is the opposite of endothermic?

The opposite of an endothermic process is an exothermic process, one that releases, “gives out” energy in the form of heat. Thus in each term (endothermic & exothermic) the prefix refers to where heat goes as the reaction occurs, though in reality it only refers to where the energy goes, without necessarily being in the form of heat.

### What are the products of an exothermic reaction?

In exothermic reactions, the products have less energy than the reactants, so the change is negative. In endothermic reactions, the products have more energy than the reactants, so the change is positive. The exothermic reaction of hydrogen and oxygen to form water results in a negative enthalpy change of -285.8 kJ for each molecule of water formed.