The mole fraction formula for a solution with containing one or more solutes is: Mole fraction of each solute = Number of moles of that solute divided by the total number of moles of all solutes and the solvent .
What will be the fraction of molecules having energy equal to or greater than activation energy Ea?
Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy. Answer: Fraction of molecules having energy equal to greater than activation energy, Thus, = ? 18.8323 = x = antilog ( ) = 1.47 × 10 ?
How do you find the fraction of a molecule?
The mole fraction formula for a solution with containing one or more solutes is: Mole fraction of each solute = Number of moles of that solute divided by the total number of moles of all solutes and the solvent .
Activation energy and reaction rate
The activation energy of a chemical reaction is closely related to its rate . Specifically, the higher the activation energy, the slower the chemical reaction will be. ... The higher the barrier is, the fewer molecules that will have enough energy to make it over at any given moment.
What is activation energy?
Activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.
What is the fraction of molecules having energy equal to?
It is equal to e-Ea/RT at temperature T. This quantity is called ‘Boltzmann factor’.
What is the fraction of molecules having energy?
solution : according to Arrhenius equation, where represents fraction of molecules having energy equal to or greater than activation energy , . Therefore the correct option is (D) . also read similar questions : The Rate of a fraction becomes double with every 10°Rise in temperature .
What will be the function of molecules having energy equal to or greater than activation energy?
For a chemical reaction to occur, there must be a certain number of molecules with energies equal to or greater than the activation energy. With an increase in concentration, the number of molecules with the minimum required energy will increase, and therefore the rate of the reaction will increase.
What is the activation energy of a reaction if its rate doubles?
269 kJ mol−1 .
Which of the following is affected by Catalyst a ∆ h b ∆ s/c ∆ G D EA?
Activation energy is thus affected by the use of catalysts, therefore the answer is option D, Ea.
What happens as the activation energy increases quizlet?
What happens as the activation energy increases? The kinetic energy of colliding molecules changes .
What is the activation energy for the reverse reaction?
...the activation energy of the reverse reaction is just the difference in energy between the product(s) (right) and the transition state (hill) . Thus, for this endothermic reaction, Ea,rev=Ea,fwd−ΔHrxn .
Is activation energy negative or positive?
The activation energy for an elementary chemical reaction is always positive and no one will change that. It is different with the apparent activation energy, but it has nothing to do with the former.
What is activation energy give example?
In a fire, we convert carbon in the form of wood into CO2 and is a more stable form of carbon than wood, so the reaction proceeds and in the process produces heat. In this example, the activation energy is the initial heat required to get the fire started .
What is activation energy How is it lowered?
Enzymes allow activation energies to be lowered. Enzymes lower the activation energy necessary to transform a reactant into a product . ... Consequently, an enzyme-catalyzed reaction pathway has a smaller energy barrier (activation energy) to overcome before the reaction can proceed.
What is an example of activation energy?
This energy is called activation energy. For example, activation energy is needed to start a car engine . Turning the key causes a spark that activates the burning of gasoline in the engine. The combustion of gas won’t occur without the spark of energy to begin the reaction.
