Write the expressions for 𝐾𝑐 for the following reactions. In each case indicate whether the reaction is homogeneous or heterogeneous. (g) 2 C₈H₁₈(𝑙) + 25 O₂(𝑔) ⇌ 16 CO₂(𝑔) + 18 H₂O(𝑙)

Video transcript

Hello everyone today. We are being given the fallen chemical reaction and asked to provide the case expression as well as determine if it is homogeneous or heterogeneous. And so we have the following chemical equation here. So the first thing we wanna do is when writing our case expressions, we're gonna write K. C. Is equal to the concentration of our products over the concentration of our reactant. For Casey expressions. It's also important to note that we don't include solids or liquids. So we don't include solids or liquids. And so when writing our first product out we see that this mercury oxide is in a solid form. So we don't include it. And instead we're going to write a one in its place. The only reactant that's in the gaseous form is this molecular oxygen or 02. So we're just gonna write oh two there. And this will be our K. C. Expression now to determine if it is homogeneous or heterogeneous. We simply have to look at the states of matter for each reactant and product. Our first reaction is in a liquid form. Our second react is in the gas form and our product is in the solid form. So since each of these are indifferent phases, we're going to say that this is a heterogeneous reaction. So it's a heterogeneous reaction because the states of matter for our reactant and products are different. I hope this helped until next time