In a thermal power station, coal is burned to boil water into high-pressure steam that turns turbines to…

In a thermal power station, coal is burned to boil water into high-pressure steam that turns turbines to generate electricity. What is the correct sequence of energy transformations?
  1. Electrical $\rightarrow$ Chemical $\rightarrow$ Heat $\rightarrow$ Mechanical
  2. Chemical $\rightarrow$ Heat $\rightarrow$ Mechanical $\rightarrow$ Electrical
  3. Mechanical $\rightarrow$ Heat $\rightarrow$ Chemical $\rightarrow$ Electrical
  4. Heat $\rightarrow$ Mechanical $\rightarrow$ Sound $\rightarrow$ Chemical

Solution

Chemical energy in coal releases heat energy upon burning, which creates steam motion (mechanical energy) to drive generators producing electrical energy.

Asked in: Homi Bhabha Practice

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