1 1 a. Use the data collected by experiment to calculate a molar enthalpy of reaction for methanol. (2600g) (4.1843/g") C219-20.5) = 805003 = 80.5 KJ Answer: 4.389 32.02g/mol = 1362mol [-598 kJ/mol ] -805kJ <- O.1362 mol Answer: b. Use the value calculated in question 4.a to calculate the standard molar enthalpy of formation for methanol [-279.1 kJ/mol or -367.1 kJ/mol, only one is correct!] -598 kJ/mol CH₂OH+3/202-32H₂0 CH 30H C-393.5)+2mol C-285.8)-(597.9) = -367.1 kJ c. Calculate a percentage difference between the value calculated in question 4.b and the value for the standard molar enthalpy of formation for methanol shown in your Chemistry 30 Data Booklet (This can be found posted on Moodle - you should print off a copy and keep it handy for all of your assignments, if you have not already done so) Standard molar enthalpy of formation =CH₂OH(1) -239.2 for methanol [ 53.5 % ]

Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter7: Chemical Energy
Section: Chapter Questions
Problem 88E
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Can you do question c please
1
a. Use the data collected by experiment to calculate a molar enthalpy of reaction for
methanol.
1
Answer:
4.389
32.02g/mol
= 1362mol
b. Use the value calculated in question 4.a to calculate the standard molar enthalpy of
formation for methanol
[-279.1 kJ/mol or -367.1 kJ/mol, only one is correct!]
Answer:
[-598 kJ/mol ]
-80.5kJ = -598 kJ/mol
0.1362 mol
CH₂OH+3/202-32H₂0 CH3OH
C-393.5)+2mol C-285.8)-(597.9)
= -367.1 kJ
C2600g)c4.189J/g)
C21.9-20.5) = 905003
= 80.5 KJ
Answer:
c. Calculate a percentage difference between the value calculated in question 4.b and
the value for the standard molar enthalpy of formation for methanol shown in your
Chemistry 30 Data Booklet (This can be found posted on Moodle - you should print
off a copy and keep it handy for all of your assignments, if you have not already done
so)
Standard molar enthalpy of formation =CH₂OH(1) -239.2
[ 53.5 % ]
Transcribed Image Text:1 a. Use the data collected by experiment to calculate a molar enthalpy of reaction for methanol. 1 Answer: 4.389 32.02g/mol = 1362mol b. Use the value calculated in question 4.a to calculate the standard molar enthalpy of formation for methanol [-279.1 kJ/mol or -367.1 kJ/mol, only one is correct!] Answer: [-598 kJ/mol ] -80.5kJ = -598 kJ/mol 0.1362 mol CH₂OH+3/202-32H₂0 CH3OH C-393.5)+2mol C-285.8)-(597.9) = -367.1 kJ C2600g)c4.189J/g) C21.9-20.5) = 905003 = 80.5 KJ Answer: c. Calculate a percentage difference between the value calculated in question 4.b and the value for the standard molar enthalpy of formation for methanol shown in your Chemistry 30 Data Booklet (This can be found posted on Moodle - you should print off a copy and keep it handy for all of your assignments, if you have not already done so) Standard molar enthalpy of formation =CH₂OH(1) -239.2 [ 53.5 % ]
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