Problem 9.112 The apparatus shown consists of three temperature-jacketed 1.460 L

Question

Problem 9.112

The apparatus shown consists of three temperature-jacketed 1.460 L bulbs connected by stopcocks. Bulb A contains a mixture of H2O(g), CO2(g), and N2(g) at 25C and a total pressure of 570 mm Hg . Bulb B is empty and is held at a temperature of -70C. Bulb C is also empty and is held at a temperature of -190C. The stopcocks are closed, and the volume of the lines connecting the bulbs is zero. CO2 sublimes at -78C, and N2 boils at -196C.

Part A

The stopcock between and is opened, and the system is allowed to come to equilibrium. The pressure in and is now 206 . What do bulbs and contain? (multiple choice)

Part B

How many moles of H2O are in the system?

Express your answer using two significant figures.

Part C

Both stopcocks are opened, and the system is again allowed to come to equilibrium. The pressure throughout the system is 32.0 mm Hg . What do bulbs A, B, and C contain? (multiple choice)

4. Bulb A contains N2(g), bulb B contains N2(g) and H2O(s) and bulb C containsN2(g) and CO2(s).

Part D

How many moles of N2 are in the system?

Part E

How many moles of CO2 are in the system?

1. Bulb A contains CO2(g), and bulb B contains N2(g), CO2(g) and H2O(s). 2. Bulb A contains N2 (g), CO2(g) and H2O(g) and bulb B contains N2(g), CO2(g) and H2O(s). 3. Bulb A containsN2(g) and CO2(g), and bulb B contains .N2(g), CO2(g) and H2O(s). 4. Bulb A contains N2(g), and bulb B contains CO2(g) and H2O(s). 25 OC 70 OC 190 oC

Explanation / Answer

A)

CO2 is a gas which has a higher weight..When stop coks are opened all 3 gases can move to the other bulb.N2 and H2O gases can go fastly than CO2. So it is not possible to remain N2 or H2O gas in A bulb and move all CO2 to B bulb...But other possibilities are allowed.Therefore (1), (2), (3) statements can be taken as answers.

B) CO2 sublimes at -78C, and N2 boils at -196C. When all stopcoks are opened gases freely move from a high pressure to a low pressure.According to the pressure and the temperatures the 1st answer should be correct.Bulb A contains N2 and CO2 gases.Bulb B contains H2O gas and bulb C contains CO2 gas.

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