What changes did you notice when mass increased, but volume stayed the same?

If the volume stays the same, then an increase in mass will cause an increase in density. However, an increase in mass along with an increase in volume can give rise to no increase in density, which would describe an intensive property

Explanation:

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the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.