Posted by **emily ** on Monday, December 3, 2012 at 2:11pm.

A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5 .

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.

Express the change in enthalpy in kilojoules per mole to three significant figures.

## Answer This Question

## Related Questions

- Chemistry - A calorimeter contains 22.0 mL of water at 14.0 C. When 2.50 g of X...
- 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 ...
- Chemistry - A calorimeter contains 21.0 mL of water at 14.0 degreesC. When 1.90 ...
- Chemistry Urgent - A calorimeter contains 32.0mL of water at 13.0∘C . When...
- chem - A calorimeter contains 16.0ml of water at 15.0degrees celsius. When 1.60g...
- Chemistry - A calorimeter contains 30.0 mL of water at 11.0 degrees C. When 1.50...
- ap chem - A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a ...
- Calorimetry - A calorimeter contains 21.0 mL of water at 12.0 degress Celsius. ...
- chemistry - substance X has a molar mass of 107.6 g/mol. When 2.50 g of ...

More Related Questions