Question

Hi, could you please explain step-by-step what to do? Thank you.

Two glass bulbs, each with the same volume, are connected together (and open to each other) and filled with Ar(g). When the two bulbs are immersed in a water bath at 85°C, the gas pressure is 0.78 atm. One of the bulbs is then removed (but not disconnected from the other) from the water bath at 85°C and immersed in a water bath at 22°C. Now, what is the pressure of the gas? Assume that the Ar(g) behaves ideally.

Answer 1

Consider the volume of one bulb V , assume the two bulbs as single bulb of volume 2V (at 85⁰C),then apply ideal gas equation on the system and determine the relation of no. of moles in terms of V & and constants .

Now apply the ideal gas equation for two bulbs independently at different temperartures and determine the relation for pressure. As the pressure is a scalar quantity so we can add the pressures obtained for both the bulbs to get total pressure at equilibrium.