You may have noticed that latex helium balloons tend to shrink rather quickly: a

Question

You may have noticed that latex helium balloons tend to shrink rather quickly: a balloon filled with air lasts a lot longer. Balloons shrink because gas diffuses out of them. The rate of diffusion is faster for smaller particles and for particles of higher speed. Diffusion is also faster when there is a large difference in concentration between two sides of a membrane. Given these facts, explain why an air-filled balloon lasts longer than a helium balloon. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Since there is almost pure helium in a helium balloon and almost no helium in the outside air. helium tends to diffuse the balloon. Similarly, with almost no oxygen or nitrogen in the balloon initially and high concentrations of oxygen and nitrogen in the air, these molecules tend to diffuse the balloon. However, since helium atoms travel about three times faster than oxygen or nitrogen molecules and since helium atoms are smaller, they diffuse much so. gas leaves the balloon faster than it enters. An air-filled balloon has the same particles inside as outside and, therefore, the stated effect to the deflation of such balloons.

Explanation / Answer

1) helium tends to diffuse out of the balloon

2) tend to diffuse into the ballon

3) they diffuse much faster

4) the stated effect does not contribute

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