// Since vaccume has zero mass
U = 0; H0 = 0; S = 0;
// If the vaccume ha reduced to dead state
U0 = 0; H0 = 0 ; S0 = H0; V0 = 0;
P0 = 100; V = 1;
fi = P0*V;
disp("kJ",fi,"The energy of the complete vaccume is")