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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Shweta Thakur posted an Question
September 30, 2020 • 17:08 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Plz check i am confused in c and d option s) at 0°c and 1 atm pressure 1 mole of h,o(g) at 100°c
8. Mark out the correct decreasing order entropy 1 mole of H,O(1) at 4° and 1 atm pressure 1 mole of H,O(s) at 0°C and 1 atm pressure 1 mole of H,O(g) at 100°C and 1 atm pressure 1 mole of H,O(I) at 0°C and 1 atm-pressure II>> IV > 1|l V (A) (B) Il> IV >|> 1ll (C) IIl> IV >|> || (D) 1>1> IV>II 9. Standard molar enthalnv of formation af CO io aaual to:
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Dinesh khalmaniya 1
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option C
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This is because solid is less random than liquid which is tun is less random than gas .For the same state, at the same pressure, higher the temperature , greater is the randomness.
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sir but answer is c
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okay let me confirm it
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and sir why u didn't give answers of my previous questions
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actually I'm busy so couldn't reply
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ok sir
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sir answer ?
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yes, wait..
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you know Water has its maximum density of 1g/cm3 or 1000kg/m3 at 4∘C. When the temperature changes from either greater or less than 4 degrees, the density will become less than 1g/cm3. Water has the maximum density of 1g/cm3 only when it is pure water.
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so at 4°C, volume decrease so randomness decrease
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Priyanshu kumar Best Answer
Option C is correct 1 mol of water(l) at 4°C has less randomness than at 0°C
while heating water from 0°C to 4°C range some of the hydrogen bonds between water molecules gets broken..so they come closer to each other and randomness decreases so entropy decreases
so order 3>4>1>2
sir plz explain again
shweta....read the above line
aise bs isi case main likhna
or sab to pattern follow kar hi rha hai na....gas>liquid>solid...more temp more randomness ..yha maximum density 4°C pe ho jata hai so specifically yha mention krna pda
ok sir 4 degree pe water dense ho jata and volume decrease right
yes
ok
now also u r busy
sir