Two glass bulbs A and B are connected by a very small tube having a stop-cock. Bulb A has a volume of 100 cm³ and contained the gas; while bulb B was empty. On opening the stop-cock, the pressure fell down to 40%. The volume (in mL) of the bulb B must be :
Two glass bulbs A and B are connected by a very small tube having a stop-cock. Bulb A has a volume of 100 cm³ and contained the gas; while bulb B was empty. On opening the stop-cock, the pressure fell down to 40%. The volume (in mL) of the bulb B must be :
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1 Answer
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P? = 1atm
P? = 1atm × 40/100 = 0.40atm
V? = 100 cm³
V? =?
At constant temperature, P? V? = P? V?
So V? = (P? V? ) / P? = (1atm × 100 cm³) / 0.40 atm = 250cm³
Hence, the volume of bulb B = (250 –100) cm³ = 150 cm³
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