Calculate the change in enthalpy for the following reaction using your data from parts a and b and applying hess's law. mg(s)+2h2o(l)-> mg2+(aq)+2oh-(aq)+h2(g). remember to consider the counter ions in all equations.

the ratio of the conjugate base to the acid required to attain the desired ph.

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.