Part B. (1) electrophiles, (2) free radicals, (3) nucleophiles, (4) redox-active reactants.
A. Use the internet or any other sources to find examples of the toxic effect of
these intermediates in our body and the biochemical reactions they participate in
B. Which of the reactive intermediates mentioned here are responsible for the
depletion of the ozone layer? Give the name and the structures of these
compounds.

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.

it would only be the stuff in module eight so you need to study all the lessons in that you also could check the flvs

hope this : )