What are the energy changes that take place in i.dissolving calcium carbide in water?

When calcium carbide (CaC₂) is dissolved in water, it undergoes a chemical reaction that produces acetylene gas (C₂H₂) and calcium hydroxide (Ca(OH)₂). This reaction is exothermic, meaning it releases heat, resulting in a temperature increase in the solution. The energy change involves the breaking of ionic bonds in calcium carbide and the formation of new bonds in the products, leading to the overall energy release.