[Mikez]

Does anyone know the C of MgO? I need it to find the delta H of it and the Q of it.

thanks

[xiankai]

http://en.wikipedia.org/wiki/Magnesium_oxide

according to wiki its 877 J kg-1 K-1

[Mikez]

one last thing, what is the heat capacity of HCl (hydrochloric acid) it wasn't on wiki

[mike]

The specific heat capacity of dilute HCl is basically the same as water:

4.18 J.g^-1.K^-1

[xiankai]

doesnt the HCl absorb heat? this is something new to me

[plu]

doesnt the HCl absorb heat? this is something new to me

Yes, of course.  But in most situations where the solute (HCl) is dilute, the specific heat capacity of the solvent (water) will only be affected to a minimal degree.  Thus, the specific heat capacity of a dilute solution of HCl is very close to the specific heat capacity of pure water (4.184 J K^-1 g^-1).

[Donaldson Tan]

you might need to consider if HCl evaporates from the solution as HCl gas upon absorption of heat.

[ARGOS++]

Dear All;

After I just realised how frequently this Topic is visited/searched, I think this Question deservers a somehow little more adequate answer, because, in contrary to the posts above, the property: “Specific Heat Capacity” depends very strong of the amount of Solute in Water.

In case of HCl solution you may visit:    "Specific Heat Capacity Question”
And for the same values in kJoules kg^-1 °K^-1 see on:   "Question about Specific Heat Capacity …”

Good Luck!
                    ARGOS⁺⁺