A0.875-g sample of anthracite coal was burned in a bomb calorimeter. the temperature rose from 22.50 to 23.80°c. the heat capacity of the calorimeter was found in another experiment to be 20.5 kj/°c.
a. what was the heat evolved by the reaction?
b. what is the energy released on burning 1 metric ton (exactly 1000 kg) of this type of coal?

a) 26.65 kJ was the heat evolved by the reaction.

b) 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, = 22.50°C

Final temperature of the calorimeter, = 23.80°C

The heat evolved by the reaction = Q

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:

is the energy released on burning 1 metric ton  of this type of coal