heat capacity of calorimeter is 8.75kj/g°C
heat of combustion of new substance is 42.47 kj/g C
During a combustion reaction, the heat generated for the product formation is called the heat of combustion. The heat capacity of the calorimeter is [tex]\rm 8.75 \;KJ/g ^{\circ} C[/tex] and the heat of combustion is 42.47 KJ/g.
It is a device to measure the heat absorbed and involved in the chemical reaction and system.
The heat capacity of the calorimeter can be estimated as:
The temperature change of the device can be calculated as,
[tex]\begin{aligned}\rm \Delta T &= \rm T_{2} - T_{1}\\\\&= 29.74 - 21. 90\\\\&= 7.84 \end{aligned}[/tex]
The heat energy released is calculated as,
[tex]\begin{aligned}\rm q &= 2600 \times 26.38\\\\&= 68.59 \rm \; KJ \end{aligned}[/tex]
Specific heat capacity is given as,
[tex]\begin{aligned}\rm c &=\rm \dfrac{q}{\Delta T}\\\\& = \dfrac{68.59}{7.84}\\\\&= 8.75 \;\rm KJ / g ^{\circ}C\end{aligned}[/tex]
Hence, heat capacity is [tex]8.75 \;\rm KJ / g ^{\circ}C[/tex].
The heat of combustion can be calculated as:
The temperature change of the device can be calculated as,
[tex]\begin{aligned}\rm \Delta T &= \rm T_{2} - T_{1}\\\\&= 28.76 - 22 .50\\\\& = 6.26 ^{\circ}\rm C\end{aligned}[/tex]
The heat energy released is calculated as,
[tex]\begin{aligned}\rm q &= 8.75 \times 6.26\\\\&= 54.78 \rm \; KJ \end{aligned}[/tex]
The heat of combustion is 54.78 KJ.
The heat of combustion of new substance is:
[tex]\begin{aligned} \rm q &= \dfrac{54.78}{1.290}\\\\&= 42.47 \;\rm KJ/g\end{aligned}[/tex]
Hence, the heat of combustion is 42.47 KJ/g.
Therefore, the heat capacity of the calorimeter is [tex]\rm 8.75 \;KJ/g ^{\circ} C[/tex] and the heat of combustion is 42.47 KJ/g.
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