If a gas expands from a volume of 5 liters to 15 liters at constant temperature, what can be said about the pressure of the gas? A. The pressure increases. B. The pressure decreases.

## Step 1<br />The problem involves the application of Boyle's Law, which states that the pressure and volume of a gas have an inverse relationship when the temperature is held constant. This means that if the volume of the gas increases, the pressure decreases, and vice versa.<br /><br />## Step 2<br />In this problem, the volume of the gas increases from 5 liters to 15 liters. According to Boyle's Law, this increase in volume would result in a decrease in pressure.