Joint International Conference on Long-term Experiments ...

After the laboratory analyses the heat energy produced during the burning of a 100 g
sample was calculated in the meat meal using the two main components (neglecting
heat loss and the creation heat of pollutants).
The calculation
The enthalpy of reaction was calculated from the measured parameters.
ΔH – enthalpy from reaction (thermal energy will rise from burning of meat meal)
ΣΔHkproduct-ΣΔHkstart= ΔH
I. C + O2 = CO2
II. 2H2 + O2 = 2 H2O
For 1 mol:
I. ΔH = ΔHCO2 – (ΔHC +ΔHO2) = -394 kJ
II. ΔH = 2ΔHH2Ogaz– (ΔHO2 +2ΔHH2) = -484 kJ
For 100 g dry sample:
The arithmetical middle of b/1-b/3 samples:
Content of carbon: 41,3 %, the content of hydrogen 2,27 %.
The heat from the reaction: ΔH = 1335,66 + 274,42 =1610,08 kJ.
For 1000 g sample:
Later the quantity of heat for 1000 g of material was calculated at 16,1 MJ/kg.
The viscosity of fat and water was analysed and the results at different temperatures are
presented in the next table.
Viscosity of
fat (°E)
Viscosity of
water (°E)
Table 3: Viscosity and temperature of fat and water
23,4 40
Temperature (°C)
60 80 98,3
28,15 3,89 2,35 1,78 0,51
1,00 0,65 0,61 0,35 0,21
Diagram 1 shows the rising viscosity of fat and water at different temperature.
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