To determine the new volume of the gas, we need more information about the pressure change or any other relevant data. The constant temperature alone is not sufficient to calculate the new volume.
The relationship between pressure (P) and volume (V) of a gas is described by Boyle's law, which states that at constant temperature, the product of the initial pressure and volume is equal to the product of the final pressure and volume:
P1 * V1 = P2 * V2
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
Without knowing the final pressure or any other relevant information, we cannot calculate the new volume. Please provide additional details or clarify the question so that I can assist you further.