 So here's your task for this video. I'm describing a reaction here. It's sulfuric acid plus zinc, giving zinc sulfate and hydrogen gas. I'd like you to write and balance the chemical equation for the reaction. Now zinc's a transition metal, but I'm telling you you can assume that the zinc ion has a two plus charge. In fact, zinc is almost always two plus. And then I'm asking you, think about for this reaction, what are the surroundings? That is when you do this reaction, what or where will you most obviously observe the change in temperature? And then the third question is, is this reaction exothermic or endothermic? And what evidence can you give for this from the description of the reaction?