13. Consider a simple 'atom' whose energy spectrum and corresponding multiplicities are given by the following table: state number E n(E) -0.1 eV 0.1 eV CO NO 0.3 eV At temperature T = 1000K, what is the average energy of this atom? (Give an answer in eV.) E = 0. lev B E = 0.1 ev 1.16 8. 617 . 10 - 5 ev/K ) ( loook ) 1.16 X= 0 BE e = 3. 19 15 + S e - BPE E : - 2 1 2 + 2 0- BE + 12 2- 3 8 o B - X+ 4/ x + 12/ x = ( 0. lev ) * + 2 / x + 7/ x 3 0 . 05 6 ev