When Pure Sulfuric Acid Is Dissolved in Water, Heat Is

When pure sulfuric acid is dissolved in water, heat is evolved. In a laboratory experiment to measure the molar heat of solution of sulfuric acid, the following procedure was followed. To a calorimeter containing 3.00 × 10² g of water at 20.00 °C, 10.65 g of H₂SO₄, also at 20.00 °C was added. The temperature of the solution, which was monitored by a digital thermometer with negligible heat capacity, increased to 26.55 °C. If the specific heat of the mixture is4.184 J g^-1 °C^-1, and the small heat capacity of the calorimeter is ignored, what is the heat evolved, per mole of sulfuric acid?Hint: Do not ignore the specific heat of water given in this problem and be sure to convert H₂SO₄ to moles before proceeding.

A) -27.4 kJ
B) -72.8 kJ
C) -78.4 kJ
D) -84.6 kJ
E) -292 kJ