The Tables
To calculate the energy per mole of substance, simply divide the number of moles which you calculated were burned into 1. because you only burned a fraction of a mole of each alcohol in each test, the answer you get when you divide 1 by the number of moles tells you how many times you must multiply the energy result in you table by, to get the energy per 1mole of substance. For this reason you should use s formulae of this form:
1 .
number of moles of substance burned * energy value in table
= energy per mole of substance.
So energy per mole = energy value from table(1/number of moles burned)
The structural formula:
The letter corresponds to the element it represents from the periodic table. The single line which links it to another letter signifies a single bond between it and the other element.
The structural formula:
C3H7OH
The letter represents it's corresponding element from the periodic table, the subscripted number on the lower right side of the letter signifies how many of those similar elements there are in the compound.
METHANOL (CH3OH)
2
3
mean average
total mass of burner before burning (g)
44.90
44.40
45.00
44.77
total mass of burner after burning (g)
43.40
42.90
43.50
43.27
mass of alcohol burned (g)
.50
.50
.50
.50
mass of water (kg)
0.1423
0.1420
0.1426
0.1423
starting temperature (deg. Centigrade)
7.00
7.00
7.00
7
final temperature (deg. Centigrade)
28.00
28.00
28.00
28.00
change in temperature (deg. Centigrade)
To calculate the energy per mole of substance, simply divide the number of moles which you calculated were burned into 1. because you only burned a fraction of a mole of each alcohol in each test, the answer you get when you divide 1 by the number of moles tells you how many times you must multiply the energy result in you table by, to get the energy per 1mole of substance. For this reason you should use s formulae of this form:
1 .
number of moles of substance burned * energy value in table
= energy per mole of substance.
So energy per mole = energy value from table(1/number of moles burned)
The structural formula:
The letter corresponds to the element it represents from the periodic table. The single line which links it to another letter signifies a single bond between it and the other element.
The structural formula:
C3H7OH
The letter represents it's corresponding element from the periodic table, the subscripted number on the lower right side of the letter signifies how many of those similar elements there are in the compound.
METHANOL (CH3OH)
2
3
mean average
total mass of burner before burning (g)
44.90
44.40
45.00
44.77
total mass of burner after burning (g)
43.40
42.90
43.50
43.27
mass of alcohol burned (g)
.50
.50
.50
.50
mass of water (kg)
0.1423
0.1420
0.1426
0.1423
starting temperature (deg. Centigrade)
7.00
7.00
7.00
7
final temperature (deg. Centigrade)
28.00
28.00
28.00
28.00
change in temperature (deg. Centigrade)
