Answer 15 points !

write a balanced chemical equation for the photosynthesis reaction in which gaseous carbon dioxide and liquid water react in the presence of chlorophyll to produce aqueous glucose (ch206) and oxygen gas.

express your answer as a chemical equation.

6 C O 2 + 6 H 2 O + Δ → C 6 H 12 O 6 + 6 O 2

Explanation:

The  Δ  symbol denotes added energy, here in the form of sunlight. Strong  C = O , and  O − H  bonds have been broken, and this bond cleavage is only partially energetically compensated by the formation of  C − H  and  O = O  bonds. Hence the reaction is endothermic (energy input on LHS). Note that the reaction is balanced with respect to mass and charge (says he, checking to see whether it is indeed balanced!).

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.