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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Madhumathy posted an Question
July 23, 2020 • 17:56 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Calculate the expansion work done when 50 g of water is electrolysed under constant pressure at 25°c.
H2O ---> H+ + -OH w= -nRTl(V2/V1) since no value for Volume is given. w= -nRT w= (50/18)*8.314J/K/mol*298K)., is this right?? but the answer is -10KJ where have I made mistake? please make me clear sir🙏🏽
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Priyanshu kumar Best Answer
check this solution
got this??
on electrolysis of water. it decomposes into hydrogen ion and hydroxy ion. is that not so sir??
yes,water undergoes self ionsiation to form hydronium ion and hydroxyl ion
but in the answer it is decomposed to hydrogen and oxygen sir?
Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen (H2) due to an electric current being passed through the water.
when self ionisation or autoionisation of water occurs then 2 molecules of water breaks into hydronium ions and hydroxyl ions
got??
yes sir completely 🙏🏽