Parr Instrument 1356 - Manual (Page 21)

21
1. Solid Fuels (D2015)
Heat of Formation of .... 29KJ/mole
Sulfuric Acid for a Fuel with 5% sulfur and 5% hydrogen
S02(g) + 1/2 02(g) + H20(1) >H2S04 in 15 moles H20
e2 = 23.7 BTU/LB x %S x 1gm = x BTU gm/LB or
e2 = 13.17 cal/gm x %S x 1gm = x cal
2. Liquid Hydrocarbon Fuels (D240)
Heat of Formation of......301.KJ/moleSulfuric Acid for a fuel with .8% sulfur and 20%
hydrogen.
S02(g) + 1/2 02(g) + 651H20 > H2S04 650H20(1)
e2 = 14 cal/gm x %S x 1gm = x cal
GAS EFFECTS CALORIMETRY
There are occasions when the calorimeter is used to test
heat powders or similar materials in an inert atmosphere.
The question then becomes what is the effect on the heat
capacity when this change is made.
360 ml oxygen bomb x30atms/10800 ml or 10.8 liters
1. Oxygen
1.429 gm/liter x 10.8 liters = 15.43 gms
.219 cal x 15.43 = 3.38 cal
gm K K
2. Argon
1.784 gm/liter x 10.8 liter = 19.27 gms
.124 cal x 19.27 gm = 2.39 cal
gm K K
3.
Helium
.1785 gm x 10.8 liter = 1.93 gm
1.24 cal x 1.93 gm = 2.39 cal
gm K K