Answer:
a) 26.65 kJ was the heat evolved by the reaction.
b) [tex]3.046\times 10^7 kJ[/tex] is the energy released on burning 1 metric ton of this type of coal
Explanation:
Heat capacity of the calorimeter = C = 20.5 kJ/°C
Initial temperature of the calorimeter,[tex]T_1[/tex] = 22.50°C
Final temperature of the calorimeter,[tex]T_2[/tex] = 23.80°C
The heat evolved by the reaction = Q
[tex]Q=C(T_2-T_1)[/tex]
[tex]Q=20.5 kJ/^oC\times (23.80^oC-22.50^oC)[/tex]
[tex]Q=26.65 kJ[/tex]
26.65 kJ was the heat evolved by the reaction.
0.875 g sample of anthracite coal was burned in a bomb calorimeter
0.875 g sample of anthracite coal gives 26.65 kJ of heat.
1 metric ton= 1000 kg
1000 kg = 1000 × 1000 g = 1,000,000 (1 kg =1000 g)
Then burning 1,000,000 g coal will give:
[tex]=\frac{26.65 kJ }{0.875}\times 1,000,000 g=3.046\times 10^7 kJ[/tex]
[tex]3.046\times 10^7 kJ[/tex] is the energy released on burning 1 metric ton of this type of coal
