Homework Help: ap chemistry

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.

ap chemistry - DrBob222, Monday, December 3, 2012 at 3:54pm
You don't have any units. 12.5 what? 2.20 what? etc.

Answer this Question

Related Questions

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 ...
chemistry - Substance x has a molar mass of 107.6 g/mol. when 2.50 g of ...
Chemistry - Assume that a reaction occurs in which unknown substances R and S ...
Chemistry - The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1...
Chemistry - The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1...
Chemistry - The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1...
Chemistry - The solubility of a substance is 12.0 g per 100.0 g of water at 60 C...
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 ...

For Further Reading

First Name:
School Subject:
Answer: