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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Mikez on April 08, 2006, 05:35:39 PM

Title: Specific heat Capacity of HCl
Post by: Mikez on April 08, 2006, 05:35:39 PM

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

thanks :)

Title: Re: Specific heat Capacity of MgO
Post by: xiankai on April 08, 2006, 08:22:20 PM

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

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

Title: Re: Specific heat Capacity of HCl
Post by: Mikez on April 11, 2006, 08:00:34 PM

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

Title: Re: Specific heat Capacity of HCl
Post by: mike on April 11, 2006, 08:13:19 PM

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

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

Title: Re: Specific heat Capacity of HCl
Post by: xiankai on April 12, 2006, 06:02:56 AM

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

Title: Re: Specific heat Capacity of HCl
Post by: plu on April 16, 2006, 08:18:21 PM

Quote from: xiankai on April 12, 2006, 06:02:56 AM

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

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).

Title: Re: Specific heat Capacity of HCl
Post by: Donaldson Tan on April 28, 2006, 09:25:58 PM

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

Title: Re: Specific heat Capacity of HCl
Post by: ARGOS++ on February 15, 2008, 06:10:47 PM

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 (http://www.chemicalforums.com/index.php?topic=20822.0)”
And for the same values in kJoules kg^-1 °K^-1 see on:   "Question about Specific Heat Capacity … (http://www.chemicalforums.com/index.php?topic=22790.0)”

Good Luck!
                    ARGOS⁺⁺