# The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

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 [quote="bonanova"]first puzzle #2 = second puzzle :p[/quote]
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bbbbbbbbba
Posted: Thu Oct 02, 2008 12:57 pm    Post subject: 1

My answer, which may only be one of the possible answers: (SPOILER)
The gas is nitrogen dioxide(NO 2 ). It is brown. When you try to force it into a small box, pressure increases, and the gas turns into N 2 O 4 , which is colorless.
bonanova
Posted: Wed Oct 01, 2008 9:41 pm    Post subject: 0

first puzzle #2 = second puzzle :p
Thok
Posted: Wed Oct 01, 2008 7:10 pm    Post subject: -1

I'm assuming the gas transformed into liquid form. Looking at wiki's comments about condensation of water, that suggests that the proper solution would be to heat the small box (which should prevent condensation.)
Jack_Ian
Posted: Wed Oct 01, 2008 12:40 pm    Post subject: -2

I'm puzzled.
Not sure what you did. Not sure what constitutes "better".
bbbbbbbbba
Posted: Wed Oct 01, 2008 6:32 am    Post subject: -3

A big box was filled with a gas, while a small box enclosed a vacuum. I connected the boxes with a pipe, and I saw the gas quickly flows from the big box to the small one. I wanted to force more gas into the small box, and I did do it. At first nothing seemed to be wrong, but then my eye told me the gas in the small box is decreasing in quantity! I weighted the small box, and it did weigh more and more. I did the experiment again and again, and I got the same result again and again. By the time I realized what's happening, the gas was almost used up. Can you do better than me?