In fact, it is the standard conditions for temperature and pressure. These conditions happen to be 0 degrees celsius (or 273 K) and 1 atm. 1 mol of any gas at STP has a volume of 22.4 Liters.
By the way, all gas temperatures must be in K (Kelvin).
0 K is absolute zero. You can't go any lower on the temperature scale. Absolute zero is centigrade is -273 C. (C = K - 273)
On a random note, Gay-Lussac discovered the law that as air pressure increases, so does temperature. Yesterday, we tried to find the molar mass of air. I guessed 29.92 g/mol. It actually came out to be approximately 30 g/mol. We figured this out by creating a vacuum in a test tube, measuring the mass of the vacuumed (evacuated) testtube and then when it was released.
I'll update this later!
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