Ascientific law is true all the time answers how and why phenomenon happen can evolve over time is a guess

Due to data you gave I came to conclusion that there is only one right ending for this sentence. And it should sound like this: A scientific law can evolve over time.  

Copper, silver, aluminum, cobalt, chromium, mercury 

Answer : option c) heat is released during the process.explanation :

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.