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consider the substances hydrogen (h2), fluorine (f2), and hydrogen fluoride (hf). based on their molecular structures, how does the
point of hf compare with the boiling points of hy and fy?
the boiling point of hf is
the boiling point of h2, and it is
the boiling point of f2.

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.