030.102 Study Guide - Heat Capacity
Document Summary
Jacque charles: volume of gas varies linearly w/ temp, v=vo (1 + t/273. 15o c, vo, at t = 273. 15o c (absolute zero), no lower temp can be reached, abs zero temp where pressure and volume of gas theoretically reaches zero (0 kelvin) The kinetic theory relates the average kinetic energy of the particles to temperature, distribution of molecular speeds: p= 2, keavg , keavg is independent of molecular mass, raise t of system, raise total energy of gas, more molecular motion, faster avg speed, greater pressure of gas. At very high pressures, effect of molecular volume on measured gas volume: ordinary pext: free volume = container volume (too far apart, very high pext: free volume < container volume (close enough to interact, attractions lower force of collisions with wall, lower pressure to a n2 v2. Van der walls: where a is constant for particular gas: (p+ n2 a v2 )(v nb)=nrt , p= nrt.