Question

when 40.0 ml of 1.00 m h2so4 is added to 80.0 ml of 1.00 m naoh at 20.00°c in a coffee cup calorimeter, the temperature of the aqueous solution increases to 29.20°c. if the mass of the solution is 120.0 g and the specific heat of the calorimeter and solution is 4.184 j/g • °c, how much heat is given off in the reaction? (ignore the mass of the calorimeter in the calculation.)

Answer 1

We are aked to determine the heat given off in the reaction. Heat given off is determined through the equation ΔH = mCp ΔT where m is the mass, Cp is the specific heat and ΔT is the temperature difference. Substituting, ΔH = 120 g (4.184 j/g • °c) (29.2°c). Heat given off is equal to 14.66 kJ.

Answer 2

I just took the test, the answer is A. 4.62 kJ