CHEM 221 Study Guide - Fall 2018, Comprehensive Midterm Notes - Wavelength, Kinetic Energy, Electromagnetic Radiation

• School: UPenn
• Department: Chemistry
• Course: CHEM 221
• Professor: Marsha Lester

Document Summary

Intensity curves are distorted bell-shaped and always bound: classical mechanics leads to the rayleigh-jeans law, as per this law, the number of oscillators with frequency v is v^2 and each oscillator has kbt energy. This is correct only at lower intensities ultraviolet catastrophe: planck could explain the bound experimental curve by postulating that the energy of each electromagnetic oscillator is limited to discrete values. E=nh(cid:448) (cid:894)n=(cid:1004),(cid:1005),(cid:1006), (cid:895) (cid:449)here h is planck"s constant: planck"s postulate fi(cid:454)ed the failures of the ra(cid:455)leigh-jeans law, heat capacities, heat capacity is the amount of energy needed to heat a substance by 1k. It is the derivative of energy per mole with respect to t: dulong-petit law: heat capacity of a monatomic solid is 3r irrespective of temperature or atomic identity, this does not hold true at low temperatures. Wave-particle duality: wave particle duality, light has particle-like characteristics and electrons have wave-like characteristics.