If you were to expose glucose to oxygen on your lab bench, why would you not expect to see it burn as described by the reaction in Figure 8.6? a. The reaction is endergonic and requires an input of energy. b.The reaction is not spontaneous unless an enzyme is added. c. The sugar must first be phosphorylated to increase its potential energy. d. Activation energy is required for the sugar and oxygen to reach their transition state.

Video transcript

Hi everyone. Let's look at our next question. It says which of the following is required for react ints to reach their transition state. So when we think about a chemical reaction, we start with our reactant and there at a certain energy level. And let's imagine this is an extra ionic reaction. So our products are down here at this energy level. It's not just a straight shoot from reactant to products because in order to uh cause that chemical reaction, we have to break bonds and our reaction to form new bonds in our products and doing that requires an input of energy. Even if the overall profile here is favorable, we've got to put in energy to sort of deform or change or put stress on those reactant bonds to be able to break them. And this little temporary stage that forms very unstable uh in that sort of contorted or strained um arrangement is this transition state. So you have to get to the state to proceed onto the products. But because you have to put energy in, you have this peak of energy required for the reaction to take place because it can't take place unless the reactions can reach this transition state. So this energy here is the activation energy called this because it's the minimum amount of energy needed to make a reaction proceed. The molecules have to be in their transition state for the reaction to go forward. So our answer here is choice B activation energy that is required for the reactions to reach their transition state. So these other forms of energy. Chemical engineering. Mechanical energy, Electrical energy are too general. Here. We're looking for a very specific term of activation energy. Thanks for watching. See you in the next video.