Question

Using equations determine what the exact opposite of fire would be HINT: (it’s not water or ice)?

Answer 1

This question is a bit fanciful....and I do not guarantee accuracy...

Explanation:

Hydrocarbons are combusted with dioxygen to give carbon dioxide and water....and so this is `"fire"` if you like...

`CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(l)+Delta`

The reverse equation would be ...

`CO_2(g) + 2H_2O(g) +Delta rarr CH_4(g)+2O_2(g)`...

Now you would have a hard time getting the second equation to go...but let us look at the natural world..in which organisms combust glucose to give carbon dioxide, and water, and energy...and this is the `"process of respiration..."`

`C_6H_12O_6(aq) +6O_2(g) stackrel("combustion")rarr 6CO_2(g) + 6H_2O(l)+Delta`

Does not the VERY OPPOSITE reaction occur in the leaves of green plants, i.e. by means of `"photosynthesis"`?

`6CO_2(g) + 6H_2O(l) + Delta stackrel("photosynthesis")rarrC_6H_12O_6(aq) + 6O_2(g)`

And of course here the source of energy is sunlight....