anonymous
  • anonymous
what is the volume occupied by 21.6 g of water vapor at 98.0 kPa and 60 degrees Celsius
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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abb0t
  • abb0t
Use the ideal gas law formula: \(\sf \color{red}{PV = nRT}\) where you are solving for \(\sf \color{blue}{V}\). Note: P = pressure [atm] V = volume [L] n = mols (convert 21.6 grams of water -H\(_2\)O to mols by dividing by molar mass_ R = gas constant T = temp [K]
anonymous
  • anonymous
i had done that the answer should be 33.9 L but I was not able tog get that answer
anonymous
  • anonymous
so i had done 21.6 divided by the molar mass which is 18.016 H20 to give me 1.20 moles of h20

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anonymous
  • anonymous
Did you convert degrees celcius to kelvin?
anonymous
  • anonymous
yes i did.
anonymous
  • anonymous
Yes did you sub it as n in the formula?
abb0t
  • abb0t
Yes, make sure that you are also using the correct gas constant, R.
abb0t
  • abb0t
There is 8.314 and 0.08314 and both have different units.
anonymous
  • anonymous
should i be using 0.8314?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
That's the gas constant.
anonymous
  • anonymous
i do not understand what i am doing wrong
anonymous
  • anonymous
do i need to change KpA into atm?
anonymous
  • anonymous
Wait @abbot isn't is 8.314?
anonymous
  • anonymous
That's what we use at school- I read it wrong...
anonymous
  • anonymous
do i need to change Kpa into atm?
anonymous
  • anonymous
ok
anonymous
  • anonymous
Does the question require atm or kPA?
anonymous
  • anonymous
I say use kPa that's what we use...
abb0t
  • abb0t
Yes, gas constant is in units of atm.
anonymous
  • anonymous
It's different here, maybe your right @abbot
anonymous
  • anonymous
We don't use atm, it's no longer required where I live.
abb0t
  • abb0t
1 atm = 101.325 kPa.
anonymous
  • anonymous
so this is what i have. 98.0 kPa times v = 1.20 moles times 0.0831 times 333
abb0t
  • abb0t
Therefore, your gas contant, 8.314 or 0.8314 would not be the same if you did the conversion. You need to either convert to atm, or convert 8.314 to units of kPa
anonymous
  • anonymous
i am still not getting the answer.
anonymous
  • anonymous
i ended up with 3.39 has my final answer

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