How does the temperature change when magnesium is added to an acid?

When magnesium is added to an acid, a chemical reaction occurs, producing magnesium ions and hydrogen gas. This reaction is exothermic, meaning it releases heat, which causes the temperature of the solution to increase. The extent of the temperature change depends on factors such as the concentration of the acid and the amount of magnesium added. Overall, the addition of magnesium to an acid typically results in a noticeable rise in temperature.