Question

During power production in a coal-based thermoelectric power plant, the correct sequence of energy conversions taking place is:

Options

• heat → mechanical → chemical

• heat → mechanical → electrical

• chemical → heat → light

• heat → chemical → electrical

Answer 1

Heat → mechanical → electrical

Explanation:

The process starts with burning coal to release its chemical energy as heat, which then turns water into steam. This steam drives a turbine, converting the heat to mechanical energy, which in turn powers a generator to produce electrical energy.