How do catalysts in the body speed up reactions? Decreasing the amount of products formed Increasing the time it takes to react Lowering the activation energy Releasing more energy

Question 12 which of the following options are correct?

Which of these changes would increase the rate of a reaction?     Decrease concentration     Use solid rather than a gaseous form     Add catalyst     Decrease temperature

On an energy graph, the length of vertical lines represents _____. whether energy is released or absorbed the number of atoms in the activated complex the number of reactant and product atoms the amount of released or absorbed energy

Free Energy (kcal/mol) 25 20 15 10 5 0 A \ B A D Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AG ‡, for the step A to B. kcal/mol Calculate the overall energy change, AGº, for the process B to C. Which step is faster, (a) A to B or (b) C to D? kcal/mol

Which is the highest energy-the reactants the products or the activated complex?

When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this is that as the reactant concentration increases, the activation energy increases. the frequency of molecular collisions increases. the average kinetic energy of molecules increases. the rate constant increases.

Enzymes take part in nearly all metabolic reactions. What is an enzyme's impact on the activation energy of a chemical reaction? There are two parts. How do enzymes affect the activation energy of a reaction? Label the reaction energy diagram with the appropriate terms. Effect of enzymes Answer Bank activation energy with enzyme activation energy without enzyme Course of reaction Energy