How does compression affect air temperature in an engine?

When air is compressed, its temperature increases due to the principles of thermodynamics, specifically the ideal gas law. As the volume of the air decreases due to compression, the molecules are forced closer together. This increase in pressure causes the kinetic energy of the molecules to rise, and as a result, the temperature of the air also rises.

In practical applications, such as in an engine, this increase in temperature can enhance the combustion process by promoting a more efficient fuel-air mixture, leading to better performance and efficiency. For example, in gasoline engines, this principle of heat generated by air compression is essential as it preconditions the air-fuel mixture for ignition.

While other options may provide varying perspectives, they do not accurately reflect the fundamental thermodynamic principles at play regarding the relationship between air compression and temperature.