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3. Which ponds will have a higher average oxygen concentration, ponds cooler than 20 °C or ponds hotter than 20 °C?

Question

HELP ASAP!! DUE TOMORROW!! WILL MEDAL FIRST PERSON TO HELP!!

3. Which ponds will have a higher average oxygen concentration, ponds cooler than 20 °C or ponds hotter than 20 °C?

ilovemath14 · Answer

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frostbite · Answer

The solubility of oxygen in water decreases as temperature increases. What do you think the answer is? :)

mangotangochick · Answer

Cold water can hold more dissolved oxygen than warm water.

Consider:
heat + oxygen + water ⇌ dissolved oxygen

The forward reaction is exothermic, therefore to get more dissolved oxygen, we must decrease the temperature (Le Chatelier's principle) in order to favour the forward reaction of the equilibrium.

Le Chatelier's principle basically means the system will do the opposite of the way you act upon it. I.e. if you increase the temperature it will try and oppose that change.