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D-13
2.
a)
Assume that the total volume of the Erlenmeyer flask is 300 mL. For Run #1, you have added (19 +
10) mL of solution, so V1, the volume remaining in the flask, that is filled with gas and air, is (300
mL – 29 mL) = 271 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 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)
