Chem
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22 terms
Terms | Definitions |
|---|---|
 Why water is liquid at room temp | h-bonding , significant attraction of forces. |
| Why water becomes a gas at 100 degrees C | h-bonds have enough energy to break their bonds |
| Temperature is the measure of | kinetic energy |
| Pressure at absolute zero | none because theres no motion, colisions, pressure |
| Gasses are easily compressable because | Theres so much space between empty particles of gas, at room temp the space between the particles of gas is 10x the gases' volume |
| 1 atm= | 760mm Hg |
| 1 atm = | 101.3kPa |
| Real gasses differ at | low temperature and high pressures. Why? because gas shrinks and doesnt ocpy alot of aspace. |
| Why popcorn pops | there is water inside each kernel and when its heated the pressure increases inside each kernel until it has to pop |
| Ideal Gas Equation | PV= nRT |
| R= | 8.31 L kPa/ mol K (conditions of one mol of gas at STP) |
| Why attraction of particles is significant | At low temps theres not enough KE to overcome attractions, theyre less far apart so intermolecualr forces take hold |
| Ptotal | p1 + p2+ p3 ... |
| Diffusion | the mixing of gasses as they fill their container |
| STP | 0C, 101.5 kPa |
| Pressure and Temperature | P1/T1 = P2/T2 |
| Volume, pressure, temperature | P1V1/T1 = P2V2/T2 |
| Pressure and Volume | P1V1= P2V2 |
| Temp and volume | V1/T1 = V2/T2 |
| Effusion | A gas escapes from a tiny hole in its container |
| law of effusion | Rate a/rate b= square root of molar mass a/ molar mass b |
| Barometer | Used to measure atmospheric pressure |
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