Final answer:
The gas expansion process described is an isothermal process, where the volume is doubled without a change in temperature. During an isothermal expansion, the pressure of the gas decreases as the volume increases.
Step-by-step explanation:
The gas expansion process described, where the volume is doubled with no change in temperature, is an isothermal process. In an isothermal process, the temperature of the gas remains constant throughout the expansion or compression. During an isothermal expansion, the pressure of the gas decreases as the volume increases. The final pressure of the gas depends on the initial pressure and the number of moles of the gas. The gas expansion process described is an isothermal process, where the volume is doubled without a change in temperature. During an isothermal expansion, the pressure of the gas decreases as the volume increases.