Which statement best describes physical properties? A. Physical properties behave identically for all matter under the same conditions.
B. Physical properties can be observed without changing the identity of the substance.
C. Physical properties are observed by seeing how a substance reacts with other substances.
D. Physical properties cause atoms and molecules to change structure when substances are mixed.

B

Explanation:

Physical properties can be observed without changing the identity of the substance.

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.