Which of the following processes are spontaneous?

Which of the following processes are spontaneous, and which are nonspontaneous: a) the ripening of a banana, b) dissolution of sugar in a cup of hot coffee, c) the reaction of nitrogen atoms to form N2 molecules at 25οC and 1 atm, d) lightning, e) formation of CH4 and O2 molecules from CO2 and H2O at room temperature and 1 atm pressure?


   Strategy: To understand why certain processes
arespontaneous, we need to consider more closely the ways in which
thestte of a system can change.
a,b,c,d are spontaneous processes and  e is non





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