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Physics, Chemistry and Biology: Post your doubts here!

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What was that reversible reaction of Copper chloride of blue and pink in paper 11? I know it turns back to pink, but does temperature increase or decrease in the reverse reaction?
Yessss!
Even I was confused at first but I put it as decrease cuz it was an exothermic reaction................ wbu?
 
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I put that at first too, then changed it to increase. I was confused whether they're asking for temperature of the products or temperature right after mixing. o_O
I wrote increase too cuz i think a similar question has come in a previous paper
And anyways the back reaction is exothermic so i supppse temp has to increase
 
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