The energy densities of various types of coal are listed below. Anthracite 35 kJ/g Subbituminous 31 kJ/g
Bituminous 28 kJ/g Lignite 26 kJ/g
An unknown sample of one of these coals is burned in an apparatus with a calorimeter constant of 1.3 kJ/°C. When a
0.367-g sample is used, the temperature change is 8.75°C. Which type of coal is the sample?