Moments before it is ignited by the spark plug, the mixture of fuel and air inside an automobile cylinder is compressed to very high density. During the compression process, the mixture's
A) temperature stays the same but its pressure rises.
B) temperature rises dramatically and so does its pressure.
C) temperature drops dramatically but its pressure rises.
D) temperature rises dramatically but its pressure drops.

Question

Quizplus · Accepted Answer

During the compression process in an automobile cylinder, both the temperature and pressure of the fuel-air mixture increase. This is due to the gas laws, where compressing a gas (decreasing its volume) increases its pressure and temperature.

Moments Before It Is Ignited by the Spark Plug, the Mixture