Name the phase transition in each of the following situations and indicate whether it is exothermic or endothermic: (d) Molten lava from a volcano turns into solid rock.

Video transcript

Hello everyone today. We are being asked to identify the if the following processes are endo thermic or exhaust thermic and to determine the phase transition. So the scenario is liquid nitrogen is poured onto food to freeze it and then quickly evaporates. So first we can note that we have a process of evaporation happening. So we're going to say we have evaporation occurring and we have evaporation that is going from a liquid to a gas and therefore that can be known as vapor ization. So you see that's a process that's known as vaporization. So that's our answer for determining the phase transition. And so to figure out if it's endo thermic exo thermic, we want to know if bonds are breaking or forming. So we see that its evaporating. So we know that we're gonna have bonds breaking and this is an indication that we're having an endo thermic reaction or that heat is being applied for the reaction to occur. So these are final two answers. I hope this helped and until next time.