A Monatomic Ideal Gas Initially at a Pressure Of $1 \times 10 ^ { 6 }$

Multiple Choice

A monatomic ideal gas initially at a pressure of $1 \times 10 ^ { 6 }$ Pa undergoes an adiabatic expansion. After the expansion, the volume of the gas has doubled. The new pressure of the gas is

A) $5.0 \times 10 ^ { 5 }$ Pa.
B) $8.2 \times 10 ^ { 5 }$ Pa.
C) $4.5 \times 10 ^ { 5 }$ Pa.
D) $3.1 \times 10 ^ { 5 }$ Pa.