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

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

the answer is na (sodium)