Module 5.3 Calorimetry Quiz

Aqueous silver ion reacts with aqueous chloride ion to yield a white precipitate of solid silver chloride. When 10.0 mL of 1.00 M AgNO₃ solution is added to 10.0 mL of 1.00 M NaCl solution at 25 ^oC in a calorimeter a white precipitate of AgCl forms and the temperature of the aqueous mixture increases to 32.6 ^oC. Assuming that the specific heat of the aqueous mixture is 4.18 J / g x ^oC, that the density of the mixture is 1.00 g / mL, and that the calorimeter itself absorbs a negligible amount of heat, calculate the amount of heat absorbed in kJ / mol of Ag⁺.

When 25 mL of 1.0 M H₂SO₄ is added to 50 mL of 1.0 M NaOH at 25 ^oC in a calorimeter, the temperature of the aqueous solution increases to 33.9 ^oC. Assuming that the specific heat of the solution is 4.18 J /g x ^oC, that its density is 1.00 / mL, and that the calorimeter itself absorbs a negligible amount of heat, calculate the amount of heat absorbed for the reaction.

Titanium metal is used as a structural material in many high-tech applications such as jet engines. What is the specific heat of titanium in J / g x °C if it takes 89.7 J to raise the temperature of a 33.0 g block by 5.20 °C? What is the molar heat capacity of titanium in J / mol x °C?

A calorimeter was calibrated with an electric heater, which supplied 22.5 kJ of energy to the calorimeter and increased the temperature of the calorimeter and its water from 22.45 ⁰C to 23.97 ⁰C. What is the heat capacity of the calorimeter?