There is usually a temperature change. The equation for this reaction is. The general equation for an endothermic reaction is.
A very common example of an endothermic chemical reaction is photosynthesis.
When 1 mol of calcium carbonate decomposes into 1 mol of calcium oxide and 1 mol of carbon dioxide 1778 kJ of heat is absorbed. Reactants Heat Energy -- Products A reaction may involve multiple processes and some of these may release heat but as long as a reaction involves a net reduction in temperature the reaction is endothermic. In this process plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. When a chemical reaction occurs energy is transferred to or from the surroundings.
