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D-11
2.
a)
Assume that the total volume of the Erlenmeyer flask is 285 mL. For Run #3, you have added (~13 +
10) mL of solution, so V1, the volume remaining in the flask, that is filled with gas and air, is (285
mL – 23 mL) = 262 mL. Calculate the extra volume of the air-gas mixture forced into your buret as a
result of the temperature change in the air space caused by the enthalpy change in the reaction
solution. (0.8 marks)
Answer ____________________ mL
3.
b)
What percent uncertainty in your measured volume of nitrogen in the buret for run 3 does the error
due to the heat of reaction introduce? Show calculations. (0.4 marks)
Answer _______________________ %
ASSESSMENT
Performance
(1.0 mark):
Value of R (accuracy)
(1.0 mark):
Laboratory Report
(8.0 marks):
Deductions
(if any):
Total
(10.0 marks)
