An endothermic reaction is a chemical reaction that absorbs heat energy from its surroundings, resulting in a decrease in temperature. This type of reaction requires an input of energy to proceed.
Some examples of endothermic reactions include photosynthesis, melting of ice, dissolution of ammonium nitrate in water, and baking soda and vinegar reaction.
A reaction is endothermic if it feels cold to the touch, requires an input of energy to occur, and the temperature decreases during the reaction.
Endothermic reactions are used in many practical applications, such as refrigeration and air conditioning, hand warmers, cold packs, and in chemical processes that require cooling.
The rate of endothermic reactions can be affected by factors such as temperature, concentration of reactants, surface area, and presence of catalysts. Higher temperatures, higher concentrations, larger surface area, and presence of catalysts can all speed up the rate of endothermic reactions.