Parr Instrument 6400 - Manual (Page 59)

6400
Calorimeter Instruction Manual
6-4
Heat of formation of sulfuric acid (from SO
2
) is 36.1 calories / milliequivalent.
Sample mass is the mass of sample burned in the bomb (grams).
Sulfur multiplier is multiplied by the product of the user entered sulfur value
and the sample mass to arrive at the number of
milliequivalents of sulfuric acid in the bomb washings.
Example 1:
The following assumptions are made for the factory default settings of the
calorimeter
1) The acid value is that of nitric acid only
2) The concentration of the titrant used is 0.0709N
3) 1 calorie (I.T.) is equal to 4.184 Joules
4) The heat of formation of HNO
3
is 14.1 cal/meq
5) The heat of formation of H
2
SO
4
is 36.1 cal/meq
MJ/kg 42.8523 or cal/g 10241.9489
5087 . 0
0000 . 50 7439 . 24 6 . 9 ) 6468 . 5 (
5971 . 937
e - e - e - Wt
H
cal 24.7439
1 . 36 0.6238meq
087g) (2.16)(0.5
SO4) H mult)(Hf ur mass)(sulf le (%S2)(samp
cal 6 . 9
1 . 14 0709 . 0
) 6 . 9 (
) HNO mult)(H acid)(acid of (ml
3 2 1
c
2 2
3 f 1
=
− − −
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
=
=
=
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
⎟
⎠
⎞
⎜
⎝
⎛
=
=
=
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
⎟
⎠
⎞
⎜
⎝
⎛
=
=
g
cal cal cal C
C
cal
m
meq
cal
cal
e
meq
cal
ml
meq
ml
e
o
o