Completar frases EnergyVersión en línea Review the understanding of energy transformations por Eman Nadeem 1 In coal - fired powerplants , the energy in the coal goes under a series of transformations , During the process of , the chemical energy in the coal gets converted into energy . Then through the heat exchanger , the thermal energy of the exhaust gases gets converted into energy of . After that in the turbine , the thermal energy of gets converted into energy . Finally , with the help of a , the energy gets converted into energy .