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thanks this sheet is very helpful to me

perfect thanks for help 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

i am working on it for P:=1 or P:=2 or P:=3 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...

then i copy them to word(.doc)http://files.engineering.com/getfile.aspx?folder=3d35af89-6017-40ab-84df-516f5e724de4&file=van_der_waals_equation.doc http://files.engineering.com/getfile.aspx?folder=49b6aac8-9a91-4adf-b336-8532908cedaf&file=van_der_waals_equation2.doc

my worksheets are here thanks for your interesthttp://files.engineering.com/getfile.aspx?folder=a77b2465-fb2e-4e6f-9405-c430b54ea835&file=aaa.xmcd http://files.engineering.com/getfile.aspx?folder=64f1b423-c9c9-4376-b702-306efd07800d&file=aaaaaaaaaaaaaaaaaa.xmcd

it not works says func isnt defined

the equation is [P+(a/v^2)]*(V-b)=R*T i need to find volume by use this sorry about my poor english

i see, it s my fault 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...

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...