van der waals problem
van der waals problem
(OP)
hello i am new at this and i cant solve van der waals equation
on mathcad
i tried R:=0.0821 Latm\mol K
P:=1,2...3 atm T:=283,287...333 K a:=3.59 b:=0.0427
and write the equation
f(V):=[(P+(a/V^2))*(V-b)]-[R*T]
now what should i do to get volume values from this equation
i tried everything i couldnt find some examples similar
plz help on it
thanks for helps
on mathcad
i tried R:=0.0821 Latm\mol K
P:=1,2...3 atm T:=283,287...333 K a:=3.59 b:=0.0427
and write the equation
f(V):=[(P+(a/V^2))*(V-b)]-[R*T]
now what should i do to get volume values from this equation
i tried everything i couldnt find some examples similar
plz help on it
thanks for helps





RE: van der waals problem
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RE: van der waals problem
ihave pressure, temparature ,R ,a,b
i defined all i have 3 diffent pressure value
and 10 diffrent temp value (it means 30 diffrent volume values)i want to find them with van der waals
if i had have volume values i could easly found temperature
or pressure parameters but when volume is variable , it
is more complex
i think it can be solved by given-root
but i don know how
RE: van der waals problem
[P+(a/v^2)]*(V-b)=R*T
i need to find volume by use this
sorry about my poor english
RE: van der waals problem
Given
[P+(a/v^2)]*(V-b)<CTRL>=R*T
func(P,T):find(V)
i:1;10 j:1;3
func(Pj,Ti)=
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RE: van der waals problem
says func isnt defined
RE: van der waals problem
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RE: van der waals problem
RE: van der waals problem
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RE: van der waals problem
RE: van der waals problem
You need to supply a guess value for V. You futher compound whatever other problems you might have by not using units, but also using V, which is a built-in unit designating volts.
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RE: van der waals problem
but when i want to find P:=1,2..3 it say
this value must be scalar or matris
my problem is finding V for different P and T (indices)
look at new worksheets
RE: van der waals problem
RE: van der waals problem
i have no idea about vectors and matrises on mathcad
but it will help me to understand
and problem is solved
thanks and thanks again
RE: van der waals problem
TTFN
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RE: van der waals problem