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log(KH)=(a1 + a2*temp + a3/temp + a4*(log10(temp))+a5/(temp^2) + a6*(temp)^2)

H2S(g) H2S = H+ + HS- log_k -7.93 -delta_h 9.1 -analytic -45.07 -0.02418 0 17.9205 # H2S solubilities, 0 - 300Â°C, 1 - 987 atm, Jiang et al., 2020, CG 555, 119816 -T_c 373.2; -P_c 88.20; -Omega 0.1

HS- + H+ = H2S -log_k 6.994 -delta_h -5.30 kcal -analytical -11.17 0.02386 3279.0 -dw 2.1e-9 -Vm 1.39 28.3 0 -7.22 -0.59 # ref. 1 + Hnedkovsky et al., 1996, JCT 28, 125

2H2S = (H2S)2 # activity correction for H2S solubility at high P, T -analytical_expression 10.227 -0.01384 -2200 -Vm 36.41 -71.95 0 0 2.58

m_h2s = (P*y_h2s*phi(h2s(g)))/AC(h2s(aq))KH*PFPF=exp(V_m*(P-P_ref)/RT)

temp = 373KKH_H2S =10^(a1 + a2*temp + a3/temp + a4*(log10(temp))+a5/(temp^2) + a6*(temp)^2)a1 = -45.07; a2 = -0.02418; a3= 0; a4 = 17.9205;a5 = 0;a6 = 0ans = 9.9236e-09a1 = 10.227; a2 = -0.01384; a3= -2200; a4 =0;a5 = 0;a6 = 0;ans=3.3167e+06

SOLUTIONEQUILIBRIUM_PHASESH2Sg(g) 0 10END