In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about _____________ percent? March 12, 2019 – by admin In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about _____________ percent? A. 0.25B. 0.5 C. 0.75 D. 1