Melting
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This equation represents the phase change of water from a liquid to a gas, or water vapor. The heat is providing the energy required to break the intermolecular forces holding the water molecules together in the liquid phase and allowing them to move freely as a gas.
It's freezing, and yes I know there a lot of the other ones, but this one is right
The equation describes the process of ice (H2O solid) absorbing heat and melting into liquid water (H2O liquid) at its melting point temperature.
The equation describes the process of water (H2O) freezing from a liquid state to a solid state, releasing heat in the process.
In an endothermic reaction, heat is included as a reactant in the chemical equation. This indicates that the reaction requires heat to proceed, and it is absorbed from the surroundings during the process. The heat is typically written as a reactant on the left side of the equation.
The equation describes the process of liquid water (H2O(l)) undergoing a phase change into water vapor (H2O(g) ) when heat is added. This process is known as evaporation or boiling, depending on the temperature at which it occurs.
The heat required to change the temperature of 10 g of water by 1°C is less than that required for 100 g because heat capacity is an extensive property. This means that the heat capacity of a substance is directly proportional to the amount of the substance present. So, it would require 10 times more heat to change the temperature of 100 g of water compared to 10 g by the same amount.