Cold water was poured into one glass, boiling water of the same mass into the other.

Cold water was poured into one glass, boiling water of the same mass into the other. in which glass does the water have more internal energy and why?

In a glass of hot water, the internal energy of water is greater than the amount of heat that was transferred to it when heated from the temperature of cold water to boiling water. Internal energy is the energy of interaction of particles that make up water, kinetic and potential energy of molecules and atoms. When heated, the average kinetic energy of the particles of the body increases, therefore its internal energy also grows.