1) Cyclopropane, C3H6, is a general anesthetic. A 4.4-L sample has a pressure of
ID: 1039873 • Letter: 1
Question
1)
Cyclopropane, C3H6, is a general anesthetic. A 4.4-L sample has a pressure of 4.5 atm.
What is the final volume, in liters, of this gas given to a patient at a pressure of 1.0 atm with no change in temperature and amount of gas?
Express your answer using two significant figures.
2)
In the fermentation of glucose (wine making), 750 mL of CO2 gas was produced at 38 ?C and 1.00 atm.
What is the final volume, in liters, of the gas when measured at 25 ?C and 635 mmHg, when n is constant?
Express the volume in liters to two significant figures.
3)
You are doing research on planet X. The temperature inside the space station is a carefully controlled 24 ?C and the pressure is 769 mmHg . Suppose that a balloon, which has a volume of 890. mL inside the space station, is placed into the airlock, and floats out to planet X.
If planet X has an atmospheric pressure of 0.15 atm and the volume of the balloon changes to 3.08 L , what is the temperature, in degrees Celsius, on planet X (n does not change)?
Explanation / Answer
1. From the ideal gas equation, PV=nRT
Since temperature and amount are constant
PV is constant
Now, P1V1=P2V2
(4.5atm)(4.4L)=(1atm)V2
From this, V2=19.8L
The final volume of the gas is 19.8L
2) From the ideal gas equation, PV=NRT
Since n is constant, P1V1/T1=P2V2/T2
From the values specified and 1atm=760mm Hg
(760mm Hg)(75ml)/(311K)=(635mmHg)(V2)/(298)
From it, V2=86.011 ml
So, the final volume is 86ml.
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