A. Frictional heat generation is work done by overcoming friction. During the friction process, mechanical energy is consumed, internal energy increases, and mechanical energy is converted into internal energy, so A is false; p> B. The water turbine of the hydroelectric plant drives the generators that convert mechanical energy into electrical energy to produce electricity, so B is correct;
C. The electric motor drives the water pump to send water to a high level. places, which converts electrical energy into mechanical energy, so C is correct;
D. The heat released by burning fuel is used to convert chemical energy into internal energy, so D is correct.
So choose A.
Among the following energy conversions, chemical energy is converted into electrical energy: ( ) A. Hydroelectric energy B. Thermal energy production C ． Energy production marepower D. Wind energy
Nuclear fusion and nuclear fission are not chemical changes, they are physical changes. Chemical changes are the process of breaking and reuniting chemical bonds. Nuclear fusion is a change within the atom, and the substance itself does it. do not change.
The production of thermal energy is a production of chemical energy. It releases a large amount of energy through combustion and is converted into electrical energy. During this process, material changes occur. Hydroelectric power is generated by converting the potential energy of water into kinetic energy and then converting the kinetic energy into energy electric via a generator. Wind power and water power are the same, both convert mechanical energy into power. Electrical energy.
Nuclear energy It generates electricityby the fission or fusion of nuclei of radioactive elements.
The main difference between physical changes and chemical changes is: whether other chemical substances are generated; the changes not only generate new substances but are also accompanied by energy changes. This change in energy often manifests itself as the release or absorption of thermal energy, light energy, and electrical energy. Therefore, the elimination method can be used to answer this question.
A. Hydroelectric production is the conversion of gravitational potential energy into electrical energy. This is a physical change that does not meet the requirements for converting chemical energy into electrical energy; B. Thermal energy production is produced by the combustion of combustible materials. The conversion of energy into electrical energy is a chemical change and responds torequirements for converting chemical energy into electrical energy;
C. to convert tidal energy into electrical energy, which is a physical change and does not meet the requirements of converting chemical energy into electrical energy;
D. Wind power generation is the conversion of wind. potential energy to electrical energy, which is a physical change and does not meet the requirements of converting chemical energy into electrical energy;
So choose B.