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November 23, 2014

Homework Help: Chemictry

Posted by Priscilla on Friday, November 18, 2011 at 8:56am.

A calorimeter contains 32.0 of water at 11.5. When 1.70 of (a substance with a molar mass of 74.0 ) is added, it dissolves via the reaction

and the temperature of the solution increases to 26.5.
Calculate the enthalpy change, , for this reaction per mole of .

Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings.

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