Use the Heat/Cool slider at the bottom of the simulation to add some energy to the chamber in the form of heat. What effect does this added energy have on the temperature, pressure, and number of collisions? http://contentstore.ple.platoweb.com/content/sharedmedia/phet_sims_batch2/gas-properties/gas-properties_en.html

The time needed for the reaction will increase.

Explanation:

As we know from kinetics of chemical reaction that the rate of the reaction (except zero order reactions) depends on the concentration of the reactants.

Rate of chemical reaction α [reactants].

If we suppose here that the reaction is a second order reaction which means that the reaction depends on the concentration of both H₂SO₄ and thiosulfate.

∴ Rate of the reaction = k[H₂SO₄][thiosulfate].

where, k is the rate constant of the reaction.

Here, the concentration of H₂SO₄ is constant, since we use a constant a mount of it.The concentration of thiosulfate decreased from flask 1 to flask 5 as the amount of added thiosulfate decreased.

Rate α [thiosulfate]

As the concentration of the thiosulfate decreased, the rate of the reaction will decrease.The rate of the reaction is the change in the concentration of the reactants per time.

Rate of the reaction = - Δ[thiosulfate]/Δt.

As we mentioned that the concentration of thiosulfate decreased, since the rate of the reaction will decrease.The rate of the reaction is inversely proportional to time (rate α 1/t).

∴ The time needed for the reaction will increase from flask 1 to flask 5.