Read the explanation
The source assigns two competing product pathways and toy Arrhenius rate constants. Enable its catalyst and hold temperature at three hundred ten Kelvin. Compare native catalyst concentration zero and zero point four molar. For pathway one the source effective barrier is thirty five minus ten times catalyst concentration, with a floor at fifteen. These cases have barriers thirty five and thirty one kilojoules per mole, so neither hits the floor. The source rate is one thousand times the exponential of minus barrier divided by zero point zero zero eight three one four times temperature. Lowering this assigned barrier by four increases the assigned rate by the displayed exact ratio. The blue and pink held bars use forty five thousand pixels per inverse second. This is a causal comparison within the page formulas, not a measured catalyst effect or a general enzyme saturation law. The source also subtracts catalyst concentration when its catalyst switch is off. We are explicitly comparing enabled cases and do not endorse that behavior as physical chemistry. Keep the catalyst enabled with its concentration zero and compare native temperatures three hundred ten and five hundred fifty Kelvin. The assigned barriers stay thirty five and fifty kilojoules per mole. Temperature appears in the denominator of each negative exponent, so raising it increases both forward rates in these cases. Blue encodes pathway one and pink encodes pathway two, with the same two hundred pixels per inverse second in both rows. The low temperature bars are therefore very short on this shared scale. The comparison does not artificially inflate them to look equal. At the reset state with reactant concentration one molar and both products zero, the source derivatives of the two product concentrations are exactly their respective forward rates. These are initial kinetic slopes, not final yields. The page assigns reverse rates as point two times pathway one and point zero five times pathway two. This temperature comparison and its preset names do not independently establish a thermodynamic equilibrium or a measured chemical reaction. Finally set temperature to three hundred ten, enable the catalyst at zero point four molar, set initial reactant to one molar and reset the timeline. The native Step button calls a four stage Runge Kutta update with time step zero point one seconds. The derivative moves material from reactant into the two products and includes the source assigned reverse rates. Each intermediate stage recomputes that derivative from its intermediate concentration vector. The held values shown here use exactly those four source stages and the final one, two, two, one weighting. Blue and pink reactant bars compare the initial and next concentration at four hundred pixels per molar. The product bars use a separately labeled magnified scale of one hundred thousand pixels per molar, because their concentrations after this short step are much smaller. They must not be compared directly with the reactant bar lengths. The three displayed next concentrations sum to one molar within floating point precision. All remain positive here, so the source clamps do not alter this case. This is one numerical toy update, not an experimentally measured reaction, proof of long term equilibrium, or claim that its animated collision particles determine the rate constants.