Which of the following indicates that an endothermic reaction has occurred

These examples could be written as chemical reactions, but are more generally considered to be endothermic or heat-absorbing processes: Melting ice cubes. Melting solid salts. ... Converting frost to water vapor (melting, boiling, and evaporation, in general, are endothermic processes.

Explanation:

Endothermic reactions are those that absorb energy in the form of heat.

In endothermic reactions the products have more energy than the reagents, this means that they do not occur exponentially.

Also in endothermic reactions is one whose enthalpy value is positive, that is, the system absorbs heat from the environment (ΔH> 0).

Some examples of endothermic reactions

The chemical decomposition of water into hydrogen and oxygen.

The plants' photosynthesis.

The production of ozone.

The decomposition of carbon dioxide to obtain carbon and oxygen.

Decomposition of proteins.

The decomposition of calcium carbonate