I am a big physics enthusiast, and I apply my learning as much as possible. Today, my literature teacher introduced this idea that when coffee and sugar are combined, new calories are born. For instance, coffee (0 kcal) + sugar (100 kcal) = 150 kcal? Unfortunately, I only pursued physics and chemistry, so I only have basic biology knowledge. Is this true? It seems unreasonable according to the law of conversation of energy and mass.