Homework Help: chemistry

Posted by Jake on Thursday, December 2, 2010 at 4:39pm.

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation.
Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g); ΔH°= –87.9 kJ
How much heat is liberated at constant pressure if 0.416 g of iron reacts with 42.0 mL of 0.457 M HCl?

chemistry - DrBob222, Thursday, December 2, 2010 at 5:27pm
Determine the limiting reagent. I believe that is Fe but you must confirm that.
Then 87.9 x (0.416/55.85) = ?? kJ.
chemistry - Julia, Thursday, December 2, 2010 at 10:05pm
The answer doesn't fit with the choices given.

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