Question

4 pts) Explain in płysical terms why, in many-electron atoms, the 2s orbital is lower in energy than the.2p sublevel, and thus get filled first in the Aufbau process 19. 20. (4 pts.) Remember the problem of counting configurations for a box of coins that are either heads-up or tails- up. What is the entropy of an entire mole of spin 1-1/2 particles in units J/K Use Stirling's approximation Inx!xInx-x b) in the all-spins-up configuration? Note: TAS would represent the minimum energy that must be expended to get the spins from probable distribution to the all-spins-up configuration. FVO 5 0