Your answer may include the following changes. Select each of the changes that you included in
your answer.
Heat the metal until it melts (physical
change)
Attempt to react the metal with oxygen
(chemical change).
Stretch the metal into a wire (physical
change)
Attempt to react the metal with acid (chemical

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.

the right answer is c i just did the question.