The graph above shows the progress of a chemical reaction. based on the graph, which of the following is true?
select one: a. reaction a is enzyme-catalyzed, while reaction b is not enzyme-catalyzed. b. reaction a is not enzyme-catalyzed, while reaction b is enzyme-catalyzed. c. reaction a uses cofactors, while reaction b does not use cofactors. d. reaction a does not use cofactors, while reaction b uses cofactors.

b. Reaction A is not enzyme-catalyzed, while reaction B is enzyme-catalyzed

Explanation:

Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.  It is the difference between the energy of activated complex and energy of reactants.

A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and convert to products.

The catalyst itself does not take part in the chemical reaction and is regenerated as such at the end.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :