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You answer your own question. There is a fall in temperature because the reaction is endothermic. The reaction needs energy, so unless you can supply some heat, the temperature will fall. Eventually, some heat from the surroundings will transfer and equilibrate the temperature. Temperature of the system is a measure of the global energy. Most reactions are exothermic so now the temperature rises and then transfers to the surroundings. A very famous example is a burning fire.
Answers. Best Answer: Endothermic process means it absorbs heat-your hands get cold if you hold the beaker. So E is endothermic. Not exothermic. For ice to melt, it has to absorb heat. For water to evaporate, it has to absorb heat. For soup to boil, it has to absorb heat. For water to condense, it has to give up heat.. ice melting B. water evaporating C. boiling soup D. condensation of water vapor E. Ammonium thiocyanate (aq) and barium hydroxide (aq) are mixed at 25Â°C: the temperature of the solution drops. I know the answer is D but why? I thought it was E but now... show more Which one of the following is an exothermic process?