c_prod K_ads*re.c_O2_aq*re.c_CN_1m^3 "Common subexpression (factored for brevity)"
Rs_Au k_Au*c_prod/(1+c_prod) "Surface rate of dissolution, Eq. 32 in Senanayake 2005"
flakes_R_Au Rs_Au*spherical_S0/V_liquid*step1(re.c_Au_solid/liquid_c0_Au*1e9) "Volumetric rate of dissolution, modulated by remaining surface area"
V_Au "(liquid_c0_Au - re.c_AuCNCN_1m)*V_liquid*Mw_Au/rho_Au" "Volume of solid phase"
V_gas V_reactor-V_liquid-V_Au "Volume of gas phase"