Question

ENED NERGY VS REACTION COORDINATE DIAGRAM MODEL T ction coordinate graph is used to show how the potential energy of the reactants become products. A reaction coordinate is a measure of the progress of the reac- An energy vs. reaction changes as they becom along the reaction pathway. Figure 1 Transition State Energy activation energy Reactants AG energy change at constant pressure Products Reaction Coordinate KEY QUESTIONS 1. Is the change in energy from reactants to products in Model 1 positive or negative? 2. According to Model 1, which cording to Model 1. which has the higher energy, the reactants or the transition state? 3. Which molecules are with high velocities and kine ecules are more likely to reach the transition state and react when they collide: those locities and kinetic energies, or those with low velocities and kinetic energies?

Answer 1

@ axres, negalive Phieng a fewny of Pendant - every of teclad ) So, if is exothermic recetion. @ light meny: Tanien she o Those with high velocity and sincerie eventy @ It will increse. 6 Dish inose of temperatur, no of ritectly & with high Khetic energy will increse and hence in they need externally Tess energy (any key ad veedy eroonied Jose, rate will increen. TS - Reverse rate constant will be smaller than forward reeehon. Energy Reactals Products Renelia (condineler

Is taplanation - Every reaction has some contain energy barrier, that reectant. energy barriera molecules has to cross to convert to priduct. Now, how much energy i rrequired to attain that particular energy ba barrier (TS) is depends on the energy gap between this two levels. Now, the energy tomaia gap behreen reactant and Transitia State (Ea) is less reaction is fast. Now, react and is close to TS meny no. of fraction of moteates with a certain de energy is highre Wheras in care of product mostecus to (22 give reverse reaction, they have to also cross a energy barria (Erevers) Hen. Every ) Ea. So, no. of moleculy with enough energy is less in case of product: so, rate will be les in case of back word reaction here the rate constant is less than forward reaction.