[Sis290025]

Calculate the theoretical value for heat of neutralization in this reaction:

HCl + NaOH --> NaCl + H2O(l)

H+ (aq) + OH- (aq) --> H2O (l) net ionic eq.

deltaH_f H+ (aq) = 0 mol
deltaH_f OH- (aq) = -230.0 kJ/mol
deltaH _f H2O (l) = -285.8 kJ/mol

By Hess' law: -285.8 kJ/mol - (-230.0 kJ/mol) = -55.8 kJ/mol??

Calculate the theoretical value of the heat of dissolution for the following reaction.

Mg(s) + 2HCl --> MgCl2 + H2 (g)

Mg (s) + 2H+ --> Mg(2+) + H2 (g) net ionic eq.

deltaH_f Mg (s) = 0 kJ/mol
deltaH_f H+ =  0 kJ/mol
deltaH_f H2 (g) = 0 kJ/mol
deltaH_f Mg(2+) = -466.85 kg/mol (Is this correct?)

By Hess' law: -466.85 kJ/mol - 0 kJ/mol = -466.85 kJ/mol??

Thank you.

[mike]

Are all of these questions from the same experiment? They all seem very similar, why not put them all in the same thread?

[Sis290025]

No, this is a completely different question/assignment; that is why it has its own post.

Did I do everything correctly?

Thanks for any help.