Potions 101 — Assignment: Lesson 2

PTNS-101 — Assignment: Lesson 2

Phase Transition: Sublimation

A few of my pure-blood classmates had never heard of dry ice before, so I decided to purchase some from the muggle world and show them how fascinating it is with the process of sublimation (where it transitions from a solid → to gas).

Dry ice is the solid, frozen form of carbon dioxide (CO2), which is a molecule that consists of one carbon atom and two oxygen atoms.  It’s colourless, non-flammable, and has a density of between 1.4 and 1.6 g/cm3.  As the surface temperature of a block of dry ice is -78.5°C, I made sure to put on my dragon-hide gloves before handling them to prevent frostbite.

As I placed the chunks of dry ice in my pewter cauldron, my pure-blood classmates gathered round in anticipation of my concoction.  I then carefully poured room temperature water from a watering can into the cauldron, and almost instantaneously, it started bubbling and everyone wowed in astonishment seeing it sublime into a gaseous state!

Since carbon dioxide is heavier than air, it created a cascading effect of overflowing the cauldron and spilling onto the table and floor.  We ran our hands through the gas, feeling the coolness flow between our fingers.  It was much colder than water ice and it didn’t leave any residue as it changed directly to a gas.  

At the end of it, they remarked that the Muggle world seemed phenomenal after all, but I assured them that the wizarding world is so much more astonishing. 

Transfiguration 101 — Assignment: Lesson 1



TNFG-101 Assignment: Lesson 1

       As I’m muggle-born and have only recently discovered the wondrous Wizarding World, Transfiguration wasn’t something I thought to be possible.  I’m slowly restructuring my idea and understanding of the world and its capabilities as I attend each new lesson at Hogwarts.  I am still very much in complete amazement with all the promising possibilities.  There is so much to learn and I am utterly intrigued.

       I would especially like to learn more about the theory in Transfiguration class.  It’s mind-boggling to me trying to wrap my head around the fact that physical objects in the world can be altered simply with magic.  How can it be so?  Just how does it work?  It is my aim to fully comprehend the theory behind Transfiguration.

       Transformation, Animagus transfiguration in particular, and Conjuration are two branches I’m most excited about.  To be able to willingly transform into an animal form whenever one wishes to, and to be able to conjure something out of thin air at any given moment—that would simply be marvellous!  I am nervous about the specificity that Transfiguration requires though.  Professor Mitchell cautioned us about that during the lesson.  But what I’m most nervous about are the dangers of Transfiguration—when spells backfire or aren’t cast correctly.  Oh, what horrors a half-completed transfiguration would be!