Humber Admissions Practice Test

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What aspect remains constant in Boyle's Law when considering the pressure and volume of a gas?

Volume
Temperature
Pressure
Amount of gas

The correct answer is: Temperature

Boyle's Law states that the pressure of a gas is inversely proportional to its volume when the temperature and the amount of gas remain constant. This means that if the pressure increases, the volume decreases, and vice versa. The key aspect that remains constant in this scenario is the temperature. In practical terms, if you obtain a sample of gas and subject it to various pressures and volumes while ensuring that its temperature does not change, you will observe that as you manipulate one variable (pressure or volume), the other will respond accordingly due to the fixed temperature. This principle is fundamental in understanding gas behavior in physics and chemistry. The other options—volume, pressure, and the amount of gas—are variables that change in response to one another under Boyle's Law, but the temperature must remain unchanged for the law to hold true. Hence, temperature is the constant aspect of Boyle's Law when examining the relationship between pressure and volume.