Describe how you would use the information depicted on the potential energy diagram below to determine the amount of required activation energy and the enthalpy change of the reaction.

Question

anonymous · Answer

attachment

anonymous · Answer

@JoannaBlackwelder

joannablackwelder · Answer

From A to B is the activation energy (the energy required to get the reaction started).

joannablackwelder · Answer

A is the energy of the reactants and C is the energy of the products.

joannablackwelder · Answer

Can you figure out how to find those mathematically?

anonymous · Answer

ummmm.. isnt there an equation something to do with Q= .. x C x deltaT

joannablackwelder · Answer

That is for calorimeters :)

joannablackwelder · Answer

Activation energy would be (potential energy at B) - (potential energy at A). Make sense?

anonymous · Answer

i remember that but i did not know it was for activation energy, now how would we tell the enthalpy change?

joannablackwelder · Answer

Yup. :) Enthalpy change would be the same idea, but (potential energy at C) - (potential energy at A)