The 2d particle in a box model can be used to describe the spectra of aromatic hydrocarbons. assume a rectangular box that extends one bond length beyond the carbon atonm contain the hydrogen atoms in the box. hint: you wil have to use some trigonometry basics to get the relevant dimensions.
a. calculate the first three electronic transitions for napthalene (bond length 1.42 angstroms)
b. calculate the first three electronic transitions for pyrene (bond length 142 angstroms)

where is the following

explanation:

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

i'm wiling to try and you : )