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Heat of Dilution - Hydrocholric Acid

Heat of Dilution - Hydrocholric Acid

Heat of Dilution - Hydrocholric Acid

(OP)
Hello,

Anyone have a good procedure or calculation method for calculating the heat generated from adding water to 37% by weight Hydrochloric Acid. I've seen the enthalpy-concentration diagram in Perry's but don't have much experience with this.

For example the heat rise of adding 100 gallons of water to 200 gallons of 37% by weight HCL.

Thanks.

RE: Heat of Dilution - Hydrocholric Acid

Hello RJB,

just a quick answer, sorry about the outdated units.

Heat of Solution for 1kg HCl:

acid concentration
[weight-%]

0.1%          485 kcal
25%           427 kcal
30%           408 kcal
35%           392 kcal
40%           374 kcal

Kind Regards,
hahor

RE: Heat of Dilution - Hydrocholric Acid

(OP)
Thanks for the response.

So if I have 100 kg of 40% by weight HCL (40 kg HCL) and dilute it to 25% HCL, from your chart I would get a heat generation of:

(427-374)*40 = 2120 kcal.

Correct?

RE: Heat of Dilution - Hydrocholric Acid

Hello RJB,

you are right.

Kind Regards,
hahor

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