Rice, potatoes and bread contain carbohydrates. During digestion, these carbohydrates are broken down into a simpler substance called glucose. Digestion follows respiration. During respiration, the glucose combines with oxygen in the cells of our body and provides energy. Thus, respiration is an exothermic process because energy is produced during this process.
C6H12O6(aq) + 6O2(9) + 6H2O(l) -----> 6CO2(g) +12H2O(I) + Energy
Glucose
