Sunday
March 29, 2015

Homework Help: Chemistry

Posted by Abby on Thursday, June 21, 2012 at 9:00pm.

A calorimeter contains 30.0 mL of water at 11.0 degrees C. When 1.50 g of X (a substance with a molar mass of 65.0 g/mol) is added, it dissolves via the reaction:

X (s)+H2O (l) ---> X (aq)
and the temperature of the solution increases to 26.0 degrees C.

Calculate the enthalpy change, Delta H, for this reaction per mole of X.

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

I have been stuck on this question and have only 1 attempt left. I am unsure of the steps to get to the answer. Please explain?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry Urgent - A calorimeter contains 32.0mL of water at 13.0∘C . When...
Chemistry - A calorimeter contains 21.0 mL of water at 14.0 degreesC. When 1.90 ...
Chemistry - A calorimeter contains 22.0 mL of water at 14.0 C. When 2.50 g of X...
Calorimetry - A calorimeter contains 21.0 mL of water at 12.0 degress Celsius. ...
Chemictry - A calorimeter contains 32.0 of water at 11.5. When 1.70 of (a ...
chemestry - A calorimeter contains 16.0 of water at 15.0. When 1.60 of (a ...
chem - A calorimeter contains 16.0ml of water at 15.0degrees celsius. When 1.60g...
ap chemistry - A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a ...
ap chem - A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a ...
chemistry - Substance x has a molar mass of 107.6 g/mol. when 2.50 g of ...

Members