A gas is initially at 2 atm and 300 K. If the pressure changes to 4 atm and the temperature changes to 600 K, what is the relationship between the initial and final volumes?

• A. The final volume is equal to the initial volume.
• B. The final volume is four times the initial volume.
• C. The final volume is half the initial volume.
• D. The final volume is double the initial volume.

Answer: (A)