22 The Ideal Gas Law

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  • i use the other R....it is 8.21 right?

  • @Tangipony

    Both values for R are effectively the same.

    The value of R I give you is 0.0821 (L*atm/mol * K) which works if your P is in atmospheres and V is in liters.

    The 8.314 value for R works for the SI units for P is in kilopascals and V is in liters.

    If you try using dimensional analysis, converting the P from atm to kPa or the other way around, you'll end up with the same value for both.

    Cheers!

  • @MyTutorBuddy  how did u get 0.080256. where is that from?

  • @TheKapakapa Not sure which number you're referring to. Could you point it out?

  • Im studying for finals and i had a quick Q, in my text book it says R=8.31 (L*kPa)/(K*mol) why are these two different if R remains the same?

  • @pressJinx

    Both values for R are effectively the same.

    The value of R I give you is 0.0821 (L*atm/mol * K) which works if your P is in atmospheres and V is in liters.

    The 8.314 value for R works for the SI units for P is in kilopascals and V is in liters.

    If you try using dimensional analysis, converting the P from atm to kPa or the other way around, you'll end up with the same value for both.

    Cheers!

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  • Good Show ol' chap.

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