Draw the lewis structures for the resonance forms of methyl azide (ch3n3). include all lone pairs of electrons and formal charges.

Methyl azide  

H3C−N−N≡N C and all N's have octets (22 electron in total)  

0  - 1 +1...0 formal charges  

H3C−N=N=N  

0...0 +1 -1 formal charges

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.