3. A sealed container with a movable piston is shown below. The piston moves as

Question

3. A sealed container with a movable piston is shown below. The piston moves as needed to equalize the internal pressure of the gas with the external atmospheric pressure. starts cold and warms slowly to room temperature. Here the gas 1 atm ext 1 atm N2 79.2 K V=6.5 N2 293 K Initial Final a. What variables are changing (circle answer/s)? Pressure/Volume/Temp/Moles b. Which are staying constant? (circle answer/s)? Pressure/Volume/Temp/Moles c. Calculate the final volume, V2 4. According to Wikipedia, we inhale 0.500 L of air during normal, restful breathing. If I'm on the beach at sea level (760.0 torr) talking to a friend in Albuquerque (30.31 in Hg) how much air are we both inhaling in a given breath? Assume the temperature is a balmy 27° C in both locations. How many moles of air am I inhaling? a. b. How many moles of air is my friend inhaling?

Explanation / Answer

(3)

Since the piston is movable and the system is isolated, so Pressure and moles remain constant, while Volume and Temperature are changing.

Using Charles' law:

V1/T1 = V2/T2

Putting values:

6.5/79.2 = V2/293

Solving we get:

V2 = 24.05

Hope this helps !

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