1. A 46.6-g sample of warm water was combined with a sample of liquid nitrogen in a Styrofoam cup calorimeter. The liquid nitrogen sample rapidly evaporated, leaving only cool water in the calorimeter. Careful temperature measurements showed that the water cooled from an initial temperature of 74.60°C to a final temperature of 8.50°C. Calculate the amount of heat released by the water. Express your answer in units of kilojoules.2. As mentioned in the Background section above, ΔHvap refers to the enthalpy or “heat” change that accompanies the vaporization of 1 mole of a liquid substance. In a Styrofoam cup calorimeter experiment, a Chem 184 student found that 10.9 kJ of energy was consumed by the vaporization of a 56.0 g sample of N2 (liquid nitrogen). Use the student’s experimental data to calculate a value for ΔHvap for N2.
1. A 46.6-g sample of warm water was combined with a sample of liquid nitrogen in aStyrofoam cup calorimeter. The liquid nitrogen sample rapidly evaporated, leavingonly cool water in the…
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