Thermal power plants typically convert what percentage of the chemical energy of coal into electricity?

1. Burning coal heats water to produce steam. 2. The steam drives a turbine connected to a generator. 3. Conversion is limited by the thermodynamic Carnot efficiency. 4. In practice modern plants convert about 30 to 40 percent of the chemical energy. 5. The rest is lost as waste heat to the cooling water and stack gases. _Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_