Estimate the value of the equilibrium constant at 540 K for each of the following reactions. Standard Thermodynamic Quantities for Selected Substances at 25∘C Substance ΔH∘f(kJ/mol) ΔG∘f(kJ/mol) S∘(J/mol⋅K) H2(g) 0 0 130.7 O2(g) 0 0 205.2 S2(g) 128.6 79.7 228.2 CO(g) -110.5 -137.2 197.7 CO2(g) -393.5 -394.4 213.8 H2S(g) -20.6 -33.4 205.8 Note that lnK=−ΔHrxn∘R(1T)+ΔSrxn∘R