Study the 3D image of a bread dough sample on the right. Explain what you see in the image, and describe the process that happens to dough in a hot oven. Use evidence to support your explanation.

In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj. 
 the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.