Use the student's data to calculate an experimental value for the enthalpy of combustion of methanol in kJ mol.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter6: Thermochemistry
Section: Chapter Questions
Problem 112AE: In a bomb calorimeter, the reaction vessel is surrounded by water that must be added for each...
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Alcohols such as methanol (CH3OH), ethanol (CH3CH2OH) and propan-1-0l
(CH3CH,CH;OH) are good fuels.
1 A student carried out an experiment to determine the enthalpy of combustion er
methanol.
Methanol was placed in a spirit burner and the mass of the spirit burner measured
The student placed 100 g of water in a copper calorimeter and clamped it abov
the spirit burner. The burner was lit and allowed to burn for a few minutes. The
flame was then extinguished and the new mass of the spirit burner found.
The measured temperature rise was 38.0 °C. The specific heat capacity of water is
4.18 JKg.
Figure 1, a diagram of the apparatus, is shown alongside Table 1 which shows
the measurements the student recorded.
Figure 1
Table 1
- Thermometer
Mass of burner
containing
methanol before
Clamp
214.02 g
Copper calorimeter
experiment
Water
Mass of burner
containing
methanol after
experiment
212.37 g
Spirit burner
Methanol
Use the student's data to calculate an experimental value for the enthalpy of
combustion of methanol in kJ mol1.
Transcribed Image Text:Alcohols such as methanol (CH3OH), ethanol (CH3CH2OH) and propan-1-0l (CH3CH,CH;OH) are good fuels. 1 A student carried out an experiment to determine the enthalpy of combustion er methanol. Methanol was placed in a spirit burner and the mass of the spirit burner measured The student placed 100 g of water in a copper calorimeter and clamped it abov the spirit burner. The burner was lit and allowed to burn for a few minutes. The flame was then extinguished and the new mass of the spirit burner found. The measured temperature rise was 38.0 °C. The specific heat capacity of water is 4.18 JKg. Figure 1, a diagram of the apparatus, is shown alongside Table 1 which shows the measurements the student recorded. Figure 1 Table 1 - Thermometer Mass of burner containing methanol before Clamp 214.02 g Copper calorimeter experiment Water Mass of burner containing methanol after experiment 212.37 g Spirit burner Methanol Use the student's data to calculate an experimental value for the enthalpy of combustion of methanol in kJ mol1.
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