Hydroelectric power generation is not the conversion of mechanical energy into electrical energy. These are all physical changes that use potential energy, kinetic energy, etc.
So-called chemical energy is the energy stored in matter, which must be reflected by chemical changes. Therefore, you are correct that there are chemical changes in the process of converting to chemical energy, otherwise it would not be reflected.
Therefore, chemical energy must be expressed through chemical changes.
The following chemical modifications are used in the process of electricity generation ( ) A. Thermal power generationB. Hydroelectric power C. Wind power D. Geothermal power
| A. No new substances are generated during the hydroelectricity production process, which is a physical change. Therefore, the option is false; B. Burning coal can produce carbon dioxide and water, which is a chemical change. Therefore, the option is correct; C. No new substances are generated during the solar heating process, which constitutes a physical change. The option is therefore false. D. No new substances are generated during the heating process of the electric heater, which is a physical change. The option is therefore false. Then choose B. |
A. During the process of producing thermal energy, new substances such as carbon dioxide are generated, which constitutes a chemical change.
B. The process of producing hydropower is only an energy conversion, no new substances are generated, and it is a physical change.
C. The wind power generation process is only energy conversion, nono new matter is generated and this is a physical change.
D. The geothermal energy production process is only an energy conversion, no new substances are generated, and it is a physical change.
Then choose A.