In bomb calorimeter, the heat released after burning increases the temperature of the calorimeter.
The heat released (Q) is given by,
Here, mf is the mass of fuel burned and Hv is the heat value of fuel.
Further, this heat raises the temperature of the bomb calorimeter according to the formula,
Here, C is the heat capacity and is the rise in temperature. We find the heat capacity of the calorimeter taking all these 4 substances. The subscript 1, 2, 3, 4 denotes the four values of heat capacities. Note that the values we obtain should not differ by much. Then we will take the average of this 4 values.
Wood (1)
Putting in the values, we have,
Coal (2)
Gasoline (3)
Ethanol (4)
Average Value
We take the average of 4 values of heat capacity,
Thus, the heat capacity up to 2 decimal places is 9.91 kJ/oC
at 1 gram Wood temp change- 1.9 Coal temp change- 3.5 Gasoline temp change- 4.7 Ethanol...