I am in summer school and I missed both of these on my test and my final is cumulative and there will be questions like these on the final.
1. Sketch a diagram representing an exothermic reaction. Label both the horizontal and vertical axes. Show reactants and products, energy of activation and (delta Hrxn) on your sketch.
2. Find (delta Hrxn) for the reaction CO(g) + NO2(g) --> CO2(g) + NO(g). Is the reaction exothermic or endothermic? Explain.© BrainMass Inc. brainmass.com March 4, 2021, 6:24 pm ad1c9bdddf
To answer these questions, it requires some reference material.
Your first question is a relatively simple one, where you have to draw a reaction profile energy diagram that displays an exothermic reaction, which means your starting materials (reactants) have to be at a higher energy than your final products.
Check out the following link for a proper drawing of one of these ...
This solution is provided in 269 words. It gives a reference to help understand how to draw a diagram for an exothermic reaction, as well as a link to a heat of formation table and equation for discovering if a reaction is exothermic or endothermic.