2000 BC and was found in tubes in Egyptian tombs dated from 1500BC
hope this helps
The first one is exothermic because energy is a reactant, the second formula is endothermic
The correct answer for this question is this one: "<span>In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change</span>. "
Hope this helps answer your question and have a nice day ahead.
