Homework Help: Chemistry

Posted by dina on Friday, April 2, 2010 at 11:35pm.

Zinc metal reacts with hydrochloric acid according to the following balanced equation.

Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)

When 0.114 g of Zn(s) is combined with enough HCl to make 51.1 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 22.5 degrees Celsius to 24.7 degrees Celsius .

Find Delta Hrxn for this reaction as written. (Use 1.0 g/mL for the density of the solution and 4.18 J/g*C as the specific heat capacity.)

Delta Hrxn =.........KJ

Chemistry - DrBob222, Friday, April 2, 2010 at 11:43pm
q = mass x specific heat x delta T.
That gives you q for 0.114 g Zn which I call delta H rxn (as it was run).
You can do q/0.114 if you want delta H in joules/g and that x 65.39 if you want delta H in joules/mole.
Chemistry - ralph, Tuesday, November 1, 2011 at 11:15pm
34.98

Answer this Question

Related Questions

chemistry - Zinc reacts with hydrochloric acid according to the reaction ...
Chemistry - Zinc reacts with hydrochloric acid according to the reaction ...
chemistry - Zinc metal reacts with hydrochloric acid to produce hydrogen gas ...
chemistry - Zinc metal reacts with hydrochloric acid (HCl) according to the ...
Chemistry multiple choice - During today’s experiment we will produce ...
chemistry - Zinc reacts with hydrochloric acid according to the following ...
Chemistry - here is the equation:Zn(s)+2HCl(aq)-->ZnCl2(aq)+H2(aq...
Chemistry - I have to write the balanced equation for the reaction between ...
Chemistry - A sample of zinc metal reacts completly with an excess of ...
Chemistry-Rates of Reaction - A chemist wishes to determine the rate of reaction...

For Further Reading

First Name:
School Subject:
Answer: