Use the standard enthalpies of formation for the reactants and products to solve for the AHpa for the following reaction. (The AH of Ca(OH)2 is -986.09 kJ/mol and liquid H2O is -285.8 kJ/mol.)
Ca(s) + 2H2O(l) + Ca(OH)2 (s) + H2(g)
AH = -414.4 kJ
The reaction is?

11 players on a field that has a maximum of 11 players

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

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.