Answer:
6CO2+12H2O+energy = C6H12O6+6O2+6H2O this reaction is an endothermic reaction.
Explanation:
Endothermic reaction is a specific type of reaction that consume energy in form of heat.In simple words the chemical or biochemical reaction that requires energy from outside is called endothermic reaction.
6CO2+12H2O+energy = C6H12O6+6O2+6H2O
This the only reaction among the 4 reactions mentioned in the question, requires energy.From that point of view it can be stated that the above reaction is an endothermic reaction.
When global winds, ocean currents, and other forces move freely across the earths surface.
Limiting reagents doesn't present in all reactions.
No. not at all
<u>Explanation:</u>
In any chemical reaction, the reactant which is used first is called as limiting reagent. From a mathematical point of view, there always won't be any limiting reagent. But in the molecular perspective, in a reaction, one of the reactant must used up since we can't count the atoms accurately.
Consequently even if there is an ideal stoichiometric ratio by means of moles mathematically, there may not exist a perfect stoichiometric ratio in terms of molecules probably in molecular view point.
