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//clc()
T = 300;//K
P = 100;//kPa
S = 25000//kJ/m^3
T1= 295;//K
P1 = 105;//kPa
RS = 50;//%
Ps = 3.5;//kPa
Ps1 = 2.6;//kPa
Vstp = 22.4143;//m^3/kmol
Pstp = 101.3;//kPa
Tstp = 273.15;//K
V = 1;//m^3
N = V * P * Tstp/(Vstp * Pstp * T);
Nfuel = N * (P - Ps)/P;
Smol = S / Nfuel;//kJ/kmol
N1 = V * P1 * Tstp/(Vstp * Pstp * T1);
Pwater = Ps1 * RS /100;
Nfuel1 = N1 * (P1 - Pwater )/P1;
S1 = Smol * Nfuel1;
disp("kJ/m^3",S1,"Heating value of gas at 295K and 105kPa = ")
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