Given integers V, T, and n representing the volume, temperature and the number of moles of a real gas, the task is to calculate the pressure P of the gas using Van der Waal’s Equation for real gas.
Van der Waal’s Equation for Real Gas:
( P + a * n2 / V2 ) * (V – n * b) = n R T)
where, average attraction between particles (a) = 1.360,
volume excluded by a mole of particles (b) = 0.03186,
Universal Gas constant (R) = 8.314
Examples:
Input: V = 5, T = 275, n = 6
Output: 2847.64Input: V = 7, T = 300, n = 10
Output: 3725.43
Approach: To solve the problem, simply calculate the pressure P of real gas by using the equation P = ((n * R * T) / (V — n * b)) — (a* n * n) / (V * V) and print the result.
Below is the implementation of the above approach:
// C++ Program to implement // the above approach #include <bits/stdc++.h> using namespace std;
// Function to calculate the pressure of a // real gas using Van der Wall's equation void pressure_using_vanderwall( double V,
double T, double n)
{ double a = 1.382;
double b = 0.031;
double R = 8.314;
// Calculating pressure
double P = ((n * R * T) / (V - n * b))
- (a * n * n) / (V * V);
// Print the obtained result
cout << P << endl;
} // Driver code int main()
{ double V = 7, T = 300, n = 10;
pressure_using_vanderwall(V, T, n);
return 0;
} |
// Java program to implement // the above approach class GFG{
// Function to calculate the pressure of a // real gas using Van der Wall's equation public static void pressure_using_vanderwall( double V,
double T,
double n)
{ double a = 1.382 ;
double b = 0.031 ;
double R = 8.314 ;
// Calculating pressure
double P = ((n * R * T) / (V - n * b)) -
(a * n * n) / (V * V);
// Print the obtained result
System.out.println(String.format( "%.2f" , P));
} // Driver Code public static void main(String[] args)
{ double V = 7 , T = 300 , n = 10 ;
pressure_using_vanderwall(V, T, n);
} } // This code is contributed by divyesh072019 |
# Python3 Program to implement # the above approach # Function to calculate the pressure of a # real gas using Van der Wall's equation def pressure_using_vanderwall(V, T, n):
a = 1.382
b = 0.031
R = 8.314
# Calculating pressure
P = ((n * R * T) / (V - n * b)) - (a * n * n) / (V * V)
# Print the obtained result
print ( round (P, 2 ))
# Driver code V, T, n = 7 , 300 , 10
pressure_using_vanderwall(V, T, n) # This code is contributed by divyeshrabadiya07 |
// C# program to implement // the above approach using System;
class GFG{
// Function to calculate the pressure of a
// real gas using Van der Wall's equation
public static void pressure_using_vanderwall( double V,
double T,
double n)
{
double a = 1.382;
double b = 0.031;
double R = 8.314;
// Calculating pressure
double P = ((n * R * T) / (V - n * b)) -
(a * n * n) / (V * V);
// Print the obtained result
Console.WriteLine(Math.Round(P, 2));
}
// Driver Code
public static void Main(String[] args)
{
double V = 7, T = 300, n = 10;
pressure_using_vanderwall(V, T, n);
}
} // This code is contributed by AnkitRai01 |
<script> // Javascript program to implement the above approach
// Function to calculate the pressure of a
// real gas using Van der Wall's equation
function pressure_using_vanderwall(V, T, n)
{
let a = 1.382;
let b = 0.031;
let R = 8.314;
// Calculating pressure
let P = ((n * R * T) / (V - n * b)) - (a * n * n) / (V * V);
// Print the obtained result
document.write(P.toFixed(2));
}
let V = 7, T = 300, n = 10;
pressure_using_vanderwall(V, T, n);
// This code is contributed by decode2207.
</script> |
3725.43
Time Complexity: O(1)
Auxiliary Space: O(1)