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ARC-Easy / MCAS_1999_8_32 / When coal is burned to produce electricity, the electrical energy produced is…

Problem

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question

When coal is burned to produce electricity, the electrical energy produced is less than the potential energy in the coal. Which best explains this observation?

choices

  • As coal is heated, some of the molecules move so fast that they are destroyed.
  • Some of the energy in coal is destroyed by the intense heat required to release its potential energy.
  • Some of the potential energy in coal is converted into forms of energy other than electricity.
  • The amount of potential energy in fuels is overestimated.

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