Question

question 14 (5 points) listen a power plant that burns coal is taking advantage of waters a) polar molecular nature. b) capacity to cool burning coal. c) high specific heat. d) significant expansion during boiling.

Explanation:

In a coal - burning power plant, the main process involves using heat from burning coal to turn water into steam. When water boils (turns from liquid to gas), it expands significantly. This expansion of steam is used to drive turbines and generate electricity.

• Option A: The polar molecular nature of water is related to its ability to dissolve substances and form hydrogen bonds, which is not relevant to the power - generation process in a coal - burning power plant.
• Option B: While water can cool, in a coal - burning power plant, the goal is to use heat to produce energy, not mainly to cool the coal.
• Option C: High specific heat of water is about how much heat it can absorb or release with a temperature change, and it is not the key property used for power generation in this context.
• Option D: When water boils, it turns into steam and expands a great deal. This expansion of steam is harnessed to do work (like turning turbines) in the power plant.

Answer:

D) significant expansion during boiling.