The Ideal Gas Law Practice Test

A fixed amount of ideal gas is taken from state 1 to state 2 in a cylinder. The temperature is held constant at $300,\text{K}$ while the volume increases from $1.5,\text{L}$ to $3.0,\text{L}$. If $P_1=300,\text{kPa}$, then $P_2$ is

An ideal gas in a cylinder with a movable piston is compressed slowly from $4.0,\text{L}$ to $2.0,\text{L}$ while the temperature and amount of gas are held constant. Initially the pressure is $100,\text{kPa}$. Compared to the initial pressure, the final pressure is