Give an example of the difference between energy transfer and energy conversion

There is an essential difference between the transformation and transfer of energy, "transformation" refers to the transformation from one form of energy to another form of energy, such as the mutual conversion of potential energy and kinetic energy, frictional heat generation is the conversion of mechanical energy into internal energy (thermal energy); And "transfer" refers to the transfer of energy, energy is transferred from one object to another, or from one part of the object to another, the form of energy remains unchanged For example, the methods of changing the internal energy of an object are heat transfer and work, "heat transfer" is the transfer of energy, and work is the change of energy.

Energy transfer: For example, heat transfer, you boil hot water, pour hot water into the cup, the cup becomes hot, then the heat energy of the water is transferred to the cup, the heat energy of the cup increases, and the heat energy of the water decreases.

Energy conversion: When people pedal bicycles and people are moving, biological energy is converted into kinetic energy. And then there's solar power, where light energy is converted into electricity.

All follow the law of energy conservation.

You hold the hot water bottle, you warm up, and the heat energy is "transferred" to you.

You're driving, wow, there's a kid in the middle of the road, it's dangerous. When a foot brakes suddenly, the friction between the tire and the ground generates heat, and the kinetic energy is "converted" into heat energy.

Transfer: The transfer of internal energy from a hot object to a low temperature object. For example: baking a fire to keep warm.

Transformation: The transformation of one form of energy into another. For example, rubbing your hands to keep warm is the conversion of mechanical energy into internal energy.

Heat transfer is energy transfer, which is both internal energy, and the form does not change, it is energy transfer.

Hydroelectric power is the conversion of mechanical energy into electrical energy, which is the conversion of energy.

The work required for the transformation is heat transfer.

Energy conversion and transfer actually refers to heat conduction, and according to the content of the second law of thermodynamics, the process of heat conduction to liquid macros is directional. This process can be carried out spontaneously in one direction, but not in the opposite direction, so the transformation and transfer of energy is directional.

The transformation and transfer of energy is directional

So the answer is: directionality

The transformation and transformation of energy or the transfer of energy are all directional. Energy is neither created nor disappeared out of thin air, it can only be transferred from one object to another, and the forms of energy can also be converted into each other. During the transfer and transformation process, the total amount of energy remains the same.

Energy is a measure of the transformation of the motion of matter, referred to as "energy". Everything in the world is in constant motion, and among all the attributes of matter, motion is the most basic attribute, and all other attributes are the concrete manifestations of motion. Energy is a measure that characterizes the ability of a physical system to do work.

Energy exists in many different forms; According to the classification of different forms of motion of matter, energy can be divided into mechanical energy, chemical energy, thermal energy, electrical energy, radiation energy, and nuclear energy. These different forms of energy can be converted into each other through the nucleus effect or chemical reactions.

The Law of Conservation of Energy: The total energy of a system can only change by the amount of energy that is transferred to or from the system. The total energy is the sum of the mechanical energy, thermal energy, and any form of internal energy other than thermal energy of the system.

Energy conversion is directional. According to the content of the second law of thermodynamics, the process of heat conduction is directional.

This process can be carried out spontaneously in one direction, but not spontaneously in the opposite direction, so the transformation of energy is directional. Energy conversion refers to the process of mutual conversion between various energies in the world or under certain conditions. Thermodynamics is the study of the thermal properties of matter primarily from the point of view of energy conversion, and it reveals the macroscopic laws that energy follows in the conversion of energy from one form to another.

Thermodynamics is a thermal theory obtained by summarizing the macroscopic phenomena of matter, and does not involve the microstructure of matter and the interaction of microscopic particles. Therefore, it is a phenomenological macroscopic theory with a high degree of reliability and universality.