A flask having a volume of 250 mL and containing air is heated to 100∘C and sealed. Then the flask is cooled to 25∘C, immersed in water, and opened. What volume of water will be drawn back into the flask, assuming the pressure remaining constant?
50.27 cm3
Let the volume (V1) of the flask be 250 mL
Temperature (T1) = 100 + 273 = 373 K
Flask cooled to temperature T2 = 25 + 273 = 298 K
According to Charles' law,
V1T1=V2T2
Hence, the volume V2 at 298 K is V1×T2T1
Therefore, V2 =250×298273= 199.73 cm3
Therefore, water drawn back is 250 - 199.73 = 50.27 cm3