unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, TAGraph, TASeries, Forms, Controls, Graphics,
Dialogs, StdCtrls;
const
R=8.314;
k=1000;
Zc=0.375;
type
{ TForm1 }
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Chart1: TChart;
Chart1LineSeries1: TLineSeries;
Edit6: TEdit;
Edit7: TEdit;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ private declarations }
public
{ public declarations }
end;
var
Form1: TForm1;
nu,P,T,V,Vkon,Vnach,dV,a,b,Tk,Vk,Pk: real;
i: integer;
implementation
{$R *.lfm}
{ TForm1 }
procedure TForm1.Button1Click(Sender: TObject);
begin
memo1.clear;
Vnach:=strtofloat(edit6.text);
Vkon:=strtofloat(edit7.text);
//воздух
Tk:=132.3;
Pk:=3640000;
//воздух
T:=0.8*Tk;
nu:=1;
Vk:=(nu*Zc*R*Tk)/(Pk);
a:=(27*sqr(Tk)*sqr(R))/(64*Pk);
b:=(Tk*R)/(8*Pk);
memo1.lines.add('b =' + floattostr((b)));
memo1.lines.add('a =' + floattostr((a)));
memo1.lines.add('Vk =' + floattostr((Vk)));
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
dV:=(Vkon-Vnach)/(k);
//воздух
Tk:=132.3;
Pk:=3640000;
//воздух
T:=0.8*Tk;
for i:=0 to k do begin
V:=Vnach+dV*i;
P:=(nu*R*T)/(V-nu*b)-(a*nu*nu)/(V*V);
chart1.title.visible:=true;
chart1.title.text.text:='Ван-дер-Ваальс';
chart1lineseries1.addXY(V,P,'',clRed);
end;
end;
end.
