The reaction between potassium (K) and water (H2O) is highly exothermic, meaning it releases a significant amount of energy. The reaction can be represented by the following chemical equation:

2K(s) + 2H2O(l) -> 2KOH(aq) + H2(g)

In this reaction, two moles of potassium (2K) react with two moles of water (2H2O) to produce two moles of potassium hydroxide (2KOH) and one mole of hydrogen gas (H2).

The heat energy released in a chemical reaction is measured in joules (J) or kilojoules (kJ) per mole of the reacting substances. The exact amount of energy released in this reaction depends on various factors, including the amount of potassium and water used and the reaction conditions (e.g., temperature).

The standard enthalpy change (ΔH°) for the reaction, which represents the heat energy change under standard conditions (25°C and 1 atmosphere pressure), is approximately -496 kJ/mol. This means that for every mole of potassium reacting with water, about 496 kilojoules of energy are released.

Keep in mind that this reaction is highly exothermic and can result in the production of a significant amount of heat, as well as the release of hydrogen gas, which is flammable. It is a highly reactive and potentially dangerous reaction that should not be attempted without proper safety precautions and expertise.
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