CHEM 1411 Lecture Notes - Lecture 2: Magnetic Quantum Number, Atmospheric Pressure, Ideal Gas Law
Document Summary
101, 325 pa = 760 torr = 760 mm hg = 29. 92 in hg = 14. 7 psi = 1 atm. The ideal gas law combines 4 variables (pressure, volume, number of moles, and temperature) into one simple expression pv = nrt. 632 mm hg c. ) 12. 2 psi d. ) 8. 43 x 104 pa. 4. 54 psi c. ) 9. 25 in hg d. ) 0. 309 atm. 0. 437 g n2, 0. 237 g o2, 0. 0340 g he. The postulate that the volume of the gas particles is small compared to the space between them breaks down at high pressure. More molecules occupy what used to be mostly empty space, and individual sizes now matter. The postulate that the forces between the gas particles are not significant breaks down at low temperatures. At low temperatures, the molecules are not moving as fast as at higher temperatures, so when they collide they have greater opportunities to interact Thermochemistry is the study of the relationships between chemistry and energy.
