Parr Instrument 6400 - Manual (Page 60)

6400
Calorimeter Instruction Manual
6-5
Example 2:
The following assumptions are made and outlined in D240.
1) The acid value is ALL nitric
2) The concentration of the titrant used is 0.0866M
3) 1 calorie (I.T.) is equal to 4.1868 Joules
4) The heat of formation of HNO3 is 57.8 kJ/mol
5) The heat of formation of H2SO4 is 301.4 kJ/mol
The calorimeter must be set accordingly. (The calorimeter performs ALL
calculations in calories, milliequivalents and degrees Celsius)
1) Set “Acid Value is Nitric Acid Only” to OFF
2) Set the “Acid Multiplier” to 0.0866
3) Set the “Sulfur Value is Percent” to ON
4) Set the “Sulfur Multiplier” to 0.6238
5) Leave the Fixed Fuse correction set to ON (50 cal = 209.34 J)
[ ]
( )
MJ/kg 42.9441 or cal/g 10257.0244
5087 . 0
0000 . 50 675 . 24 0 . 2 ) 6468 . 5 (
5971 . 937
e - e - e - Wt
H
cal 24.675
0 . 36 0.6238meq
087g) (2.16)(0.5
SO4) H mult)(Hf ur mass)(sulf le (%S2)(samp
0 . 2
1 . 14 ) 6238 . 0 )( 5087 . 0 ( % 16 . 2
0866 . 0
) 6 . 9 (
1 . 14 mult) ur Mass)(sulf le (%S2)(Samp - mult) acid)(acid of (ml
3 2 1
c
2 2
1
=
− − −
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
=
=
=
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
⎟
⎠
⎞
⎜
⎝
⎛
=
=
=
Ч
⎥
⎦
⎤
⎢
⎣
⎡
− ⎟
⎠
⎞
⎜
⎝
⎛
=
Ч =
g
cal cal cal C
C
cal
m
meq
cal
cal
e
cal
meq g
ml
meq
ml
e
o
o