The amount of UVA radiation hitting a surface at sea level in a lightly clouded day is about 70W/m2 . About half of that can be absorbed by the skin. A typical carboncarbon bond requires 348 kJ/mol to break. A person lies on the beach for about 1 hour without sunscreen (i.e. fully exposed to UVA radiation). Estimate the number of C-C bonds broken in this person’s back (about 0.18 m2 ) over that period. Assume that the average wavelength of UVA is 335 nm.
Bond Parameters
Many factors decide the covalent bonding between atoms. Some of the bond parameters are bond angle, bond order, enthalpy, bond length, etc. These parameters decide what kind of bond will form in atoms. Hence it is crucial to understand these parameters in detail and understand how changing these parameters affects the kind of bonding or various characteristics.
Bond Dissociation Energy
The tendency of an atom to attract an electron is known as its electronegativity.
The amount of UVA radiation hitting a surface at sea level in a lightly clouded day is about 70W/m2 . About half of that can be absorbed by the skin. A typical carboncarbon bond requires 348 kJ/mol to break. A person lies on the beach for about 1 hour without sunscreen (i.e. fully exposed to UVA radiation). Estimate the number of C-C bonds broken in this person’s back (about 0.18 m2 ) over that period. Assume that the average wavelength of UVA is 335 nm.
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