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FROP DESAI I do. Cuz I have IB HL Chemistry test in less than 2 weeks. :P ....Even though these videos don't really help. I'm just relieving my anxiety, lol.
The magnificent creep Just because he made the word, doesn't mean he was the one who defined or reformed Chemistry. Many others contributed to Chemistry and they added on to the subject. An example is the person who named ions. The person who discovered them asked him to name them.
I will be 21 years old this year so its been about 3-4 years since high school (and I have been working and going to trade school since then) so no test in sight for a while and Crash Course as a whole literally helped me through my HS experience lol. I was a beast and still am in History/Social Studies thanks to crash course History. I don't watch the videos as much as I used to as a teenager but its good to learn something new after a hard work week.
or had us practice sig figs while solving other problems instead of pages of just sig figuring stuff for almost a month, i think actually that might have made their marking slightly more complicated (i have to do the maths for .5 mark, derrrr) hurray for condescending idiotically lazy instructors, like my drawing instructor whom spent half the class insisting all of us redo basic shapes instead of moving on because of a few in the class whom quite frankly just sucked at art at that point in every possible way, except determination to try except being so terrible.
+Jesse Clark Additionally, Oxygen comes from Greek 'Oxy Genes', meaning acid forming, since oxygen's affinity for electrons often makes other compounds more acidic by taking their electrons. Oxy can be loosely translated into "sharp"- acids dissolve/cut away at things. For example, Oxymoron means sharply moronic (sharply dull, some even claim the word oxymoron in itself is an oxymoron). 'Genes' refers to creating something, i.e. "genesis" meaning creation.
We called it Hydrogen before it was used as spacecraft fuel. About a HUNDRED years before it was used in spacecraft fuel. Also, I don't think the original name was "flamble air"
When I was teaching I put a joke on a final exam: "If a gram-mole is Avogadro's number of molecules, is a guacamole Avocado's number of molecules?" Out of a class of 300 I got exactly 0 laughs.
I know your post is a week old but I had to respond anyway. My world history teacher did something like that: "Who wrote the Iliad?- A) Aristotle B) Homer) C) Socrates D) Walt Disney I was the only person who chuckled during the test.
Mr Green I'm enjoying all of the crash course episodes and working my way through them watching them again and again, they are fantastic. Would you do a playlist on mathematics, e.g from the fundamental basics to wherever you decide to stop. Thank you.
It would be incredibly helpful if it even went over the fundamentals of maths, your channel has helped me through a lot of my a levels except maths, the way you explain it is much simpler than my teachers, it'd be really cool if you could!
thank you for explaining how we went from alchemy to chemestry. i'd always thought we'd gone from one to the other through a better understanding of atoms, but this fills out all the blanks. plus, now i can explain it to my relatives and not have them look at me like i've grown a third head.
I haven't even finished the video yet, but I just HAD to say it. Amadeo Avagadro and Gay Lusaac are street names in a part of Córdoba, Argentina where I spent much of the last six months. So awesome to find out where they come from: CHEMISTRY! Thank you for not simplifying that part of the story, Hank!
Mr. Green , You should be my chemistry teacher . I get so lost and confused , I don't know what I'm doing . Your videos have been so helpful to me . its amazing . Thank you so much !
+Amanda Hopkins You are actually right about this. English is my second language, so I understand what he is telling, but he speaks too fast and above all nervously. I prefer the english style. Calm and clear. I'm however going to watch all the episodes because they are way to interesting to miss out on :-)
I am pretty sure that an average person with no familiarity with the subject matter would miss a lot of the important points expressed in this video. It's a combination of the fast talking and the usage of technical language without clarification or further explanation. But maybe these courses are designed for really smart people? Or maybe it's intended for people who already learned the material once and just need to jog their memory? But those notions somewhat seem to clash with the way the "fun" and carefree way the information is presented. I also suspect that the historical context that's presented in the video may also be a bit disorienting and distracting. That context may be helpful in a typical lecture where the audience is given time to process and visualize the bigger picture (the scientists' personal stories, their hypotheses and experiments, as well as the ideas of empiricism and the scientific method which are so well illustrated by these early experiments) but I'm not sure it's great info for a "crash course," which perhaps should be a bit more focused.
Quinstol why do you need to make things sound way more complicated than they are i would write a response to you but im not 100% sure what you point was.
This is a great review of chemistry (which I haven't taken in 25 years). I do hope you do a physics course at some point, as my high school physics teacher was terrible and I never attempted to learn it again. Better late than never!
Dude you guys do an amazing job and it is funny sometimes but you guys helped me anderstand a lot of things I didn't know before so thank you so so so much and keep up the amazing work thank you so much
These chemistry videos are really helpful. I'm crap at chemistry, always have been, but because I only have time for one more year at my local college and I need to cram in as many required classes as I can before next summer, I am taking a chem course that will probably knock me out with all the stuff I don't know. Thank you, Hank, for making it a little easier on me and helping me with my self-imposed summer homework :)
Currently we are doing organic chemistry... Finally something I understand! We watched your first video in class a few weeks ago and my brother had me find your channel to help me and my grade. I'm not failing but not doing so well either. Thank you for sharing so many videos, it's helping me a lot.
i have my sat chemistry in 2 weeks :') never been this nervous before. trying to watch all these videos. wish me luck (& the mental capability to memorize & understand everything)
I was watching this video as I did my pre-vocal warmup breathing exercises, and at the end, I found myself saying, "That was fun." And y'know what? It was! A half hour of breathing and learning chemistry just went by and I hardly noticed. Thanks for making this, Hank!
I'm really hoping that you'll make a physics version once this is finished, that's what I really need help on! Thank you so much for making these, you have a way of arranging words so that I can actually understand them. Keep it up!
Hank wants to teach me about chemistry. My lack-of-focus-level: noticing hank's haircut as well as the fact that cc's #'s 1 and 2 were probably filmed on the same day
All three of my children watch your videos nonstop! They love all of them! They are in 2nd, 4th and 6th grade. Thank you for the fantastic content! They enjoy all the subjects. If I had a million dollars I'd give it to you!
i've been saying this in every video but thank you for these videos. i'm learning the same material right now and this is great for refreshing my memory.
I really like to get the history perspective added to my chemistry knowledge! In school we had to have cross subject project and never understood why history and sciences never had cross projects, seems like an obvious and great idea!
I like to think that you and your brother are like Frasier and Niles. Your dad is always frustrated about your scientific arguments at home and just wants to watch Bonanza :D
The test of the school year is going to be easy! Crash Course thank you so much for making these high quality, informative videos that truly do help me pass science, social studies, and english. I wish I could just watch these videos instead of school. :)
"And if you sit there reading over the same line 22 times..." Aaaaahhh Hank! If only you said 23, hahah. Yeah. Since Avogadro's Number is to 6.022 x 10^23 Okay. Bad Chemistry jokes... :(
I love the details Thought Bubble puts into the videos! I mean just in Hank's messy college dorm there was the TARDIS and the Death Star and even a TMBG poster!
This might just be me but at some points he goes way too fast to understand it all. This is coming from a person with little knowledge of Chemistry. Still, I will be watching this series. Nothing to lose and everything to gain.
But if the french had a more equal and socially democratic system they could have deliberately given the money for research to whoever had the most promise as a scientist; rather than relying on chance that you will end up with someone who is both extremely wealthy and a genius.
Lavoisier didn't discover a single element. While he might have named them, he was not the discoverer, especially not in the part of oxygen. Hydrogen was Cavendish. Oxygen was Scheele, but Priestley was doing very similar things independantly at similar times. Edmond Genet about Lavoisier: "I also had the advantage during my stay at Birmingham of becoming acquainted with Dr. Priestley who had the kindness to repeat for my gratification his most interesting experiments on air and gases of which I sent an account to the Academy of Paris. At that time, Lavoisier was pursuing the same subject, and I was surprised on my return to hear him read a memorial at one of the sittings of the Academy which was simply a repetition in different words of Priestley's experiments which I had reported. He laughed, and said to me, "My friend, you know that those who start the hare do not always catch it."
it sounds like hank believes that economic disparity was key to the scientific achievements that took place. but consider this, if one genius with most of the money could accomplish so much by being able to afford equipment and perform experiments, how much could have been accomplished if all the people had access to that equipment and could all work together and collaborate? Don't you think there might have been some geniuses in France that just never got the chance to do anything due to that wealth disparity? He said to think about the implications and I did
I heard physicists say that according to Einstein's relativity theory matter does turn into energy thus losing mass. So in theory if i burnt 1 mole of methane and somehow collected all of the products the mass after would never be exactly equal to what i started with. I think this is pretty much negligible with combustion and all chemical reactions, though.
It's not really relativity theory, but rather the E=MC(squared) equation that makes that claim, and it is really only applicable to nuclear and particle physics, rather than chemical reactions If a quark and an antiquark annihilate, converting into energy, then that mass is lost, turned into a proportional amount of energy, but in chemical reactions all of the atoms and subatomic particles are still there. Nothing annihilates. It just get's rearranged. For this reason, while the quark flow diagrams of particle physics look alot like chemical equations, they don't necessarily balance due to the possibility of annihilation. Since mass always remains constant in a chemical system, however, chemical equations always have to be balanced. The amount of mass in a chemical system remains the same, but in particle and nuclear physics, that isn't necissarily the case because subatomic particles may annihilate.
Goku -San Again, it’s really the total sum of mass and energy in the universe that remains constant, rather than the amount of mass, strictly speaking. Photons have no mass, but can reduce the mass of a quantum system when emitted. When particles and antiparticles annihilate each other, that matter really is gone. It is replaced by a proportional amount of energy, and having all of that energy in such a small space will occasionally allow virtual particles to become real, generating new matter by having the equation run the other way. This is how particle accelerators work. The poster’s basic assumptions weren’t entirely flawed. They just have no place in chemistry, where these sorts of reactions don’t occur. If this were a video on particle physics then his point would be valid. Matter can be lost in principle. It just takes very exotic phenomena for this to occur, and the matter lost must be replaced by a proportional amount of energy, which has no mass.
Norrin Radd First of all, I wasn't replying to you. And second conservation of mass applies to a chemical reaction like something being burned, which is to what i was referring. I am trying to tell Tom k there that burning 1 mole of methane is a chemical reaction and e=mc2 is not happening there.
Could you do a Crash course for a basic breakdown of the difference between metallic, ionic and covalent bonding? I love using Crash courses as a teaching resourses!
Thank you very much for making this video, Hank Green, Michael Aranda, Jenkins and all the others at _Crash Course_ Chemistry! I have actually watched 2 episodes of _Crash Course_ in a row, something I don’t usually do, so it kind of feels like I have cheated in the game of life, but anyway...thank you! I was kind of surprised, though, that you only mentioned European chemists from one age in history and that you did not mention Chinese chemists, for example the people who invented gun powder and where the first to write down the formula for making it and who had so much knowledge of chemistry that they actually used chemicals and gases in their warfare, as described in the Wǔīng Zongyào. Nor did you mention Arabic and Persian chemists like Zakariyya-ye Razi, who worked with crystallization of different substances and who wrote about the properties of different elemens in his book ‘The Secret of Secrets’, or Jabbir ibn Hayyan - also known as the father of chemistry - who also worked with crystallization, the properties of elements, discovered a lot of acids that are still used today and that worked with different dyes. Why didn’t you mention any of these noble scientists?
