Activation energy and Chemical Energy

Use the model below to explore the following questions:

1. Two factors affect the activation energy, the strength of the bonds in the reactants and the strength of the bonds in the intermediate compounds that form partway through a reaction. Describe two ways to make the activation energy very low.
2. If the activation energy is high do you need the initial temperature of the reactants to be low or high to make the reaction happen? Why?
3. Set up a reaction so that the reaction will be spontaneous at any temperature. What is true of the activation energy. Is it high or low?
4. Set up a reaction that converts the most chemical energy into heat energy. Describe this setup.