1. Thermo-physical properties 2. Radiation properties - nptel - Indian ...
1. Thermo-physical properties 2. Radiation properties - nptel - Indian ...
1. Thermo-physical properties 2. Radiation properties - nptel - Indian ...
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Mechanical Measurements Prof S.P.Venkatesan<br />
<strong>Indian</strong> Institute of Technology Madras<br />
universal gas constant. Thus it is possible to get the desired heat of combustion<br />
as<br />
( )<br />
0<br />
T12 1 g<br />
T 2<br />
Δ H = n −n R T−∫ CdT<br />
(12)<br />
T 1<br />
In a typical experiment the temperature change is limited to a few degrees and<br />
hence the specific heat may be assumed to be a constant. Under this<br />
assumption Equation 12 may be replaced by<br />
( ) ( )<br />
0<br />
T12 1 g 2 1<br />
Δ H = n −n R T−C T − T<br />
(13)<br />
The Bomb calorimeter:<br />
1<br />
2<br />
7<br />
6<br />
5<br />
3<br />
4<br />
<strong>1.</strong>Stirrer<br />
<strong>2.</strong>Calorimeter bomb<br />
3.Jacket<br />
4.Calorimeter vessel<br />
5.PRT<br />
6.Ignition lead<br />
7.Jacket lid<br />
From: www.fire-testing.com<br />
Figure 13 Bomb calorimeter schematic<br />
Schematic of a bomb calorimeter used for the determination of heating value<br />
(standard enthalpy of combustion) of a solid fuel is shown in Figure 13. The<br />
bomb is a heavy walled pressure vessel within which the combustion reaction will<br />
take place at constant volume. At the bottom of the bomb is placed sufficient
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