Initial volume = 10 L Decrease in Volume = 25% of 10 = 10/4 = 2.5 L Final Volume = 10 - 2.5 = 7.5 L Initial Pressure = 1.5 bar PV = nRt PV = Constant {Because Temperature remains Constant} Let the final pressure is P 1.5/7.5 = P/10 P = 2 bar So %age increase = (2-1.5)/1.5 * 100 = 33.33 % Solution Initial volume = 10 L Decrease in Volume = 25% of 10 = 10/4 = 2.5 L Final Volume = 10 - 2.5 = 7.5 L Initial Pressure = 1.5 bar PV = nRt PV = Constant {Because Temperature remains Constant} Let the final pressure is P 1.5/7.5 = P/10 P = 2 bar So %age increase = (2-1.5)/1.5 * 100 = 33.33 %.