— This week we continue to spend quality time with gases, more deeply investigating some principles regarding pressure – including John Dalton’s Law of Partial Pressures, vapor pressure – and demonstrating the method for collecting gas over water. — — Transcript Provided by YouTube: 00:00 Imagine, if you will, a state dinner at the White…
Women in the 19th Century: Crash Course US History #16
— In which John Green finally gets around to talking about some women’s history. In the 19th Century, the United States was changing rapidly, as we noted in the recent Market Revolution and Reform Movements episodes. Things were also in a state of flux for women. The reform movements, which were in large part driven…
Real Gases: Crash Course Chemistry #14
— Hank bursts our ideal gas law bubble, er, balloon, and brings us back to reality, explaining how the constants in the gas law aren’t all that constant; how the ideal gas law we’ve spent the past two weeks with has to be corrected for volume because atoms and molecules take up space and for…
19th Century Reforms: Crash Course US History #15
— In which John Green teaches you about various reform movements in the 19th century United States. From Utopian societies to the Second Great Awakening to the Abolition movement, American society was undergoing great changes in the first half of the 19th century. Attempts at idealized societies popped up (and universally failed) at Utopia, OH,…
Ideal Gas Problems: Crash Course Chemistry #13
— We don’t live in a perfect world, and neither do gases – it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas law (like our culture) has unrealistic expectations when it comes…
Age of Jackson: Crash Course US History #14
— In which John Green teaches you about the presidency of Andrew Jackson So how did a president with astoundingly bad fiscal policies end up on the $20 bill? That’s a question we can’t answer, but we can tell you how Jackson got to be president, and how he changed the country when he got…
The Ideal Gas Law: Crash Course Chemistry #12
— Gases are everywhere, and this is good news and bad news for chemists. The good news: when they are behaving themselves, it’s extremely easy to describe their behavior theoretically, experimentally and mathematically. The bad news is they almost never behave themselves. — — Transcript Provided by YouTube: 00:01 Gas! It’s all around you.…
Slavery – Crash Course US History #13
— In which John Green teaches you about America’s “peculiar institution,” slavery. I wouldn’t really call it peculiar. I’d lean more toward horrifying and depressing institution, but nobody asked me. John will talk about what life was like for a slave in the 19th century United States, and how slaves resisted oppression, to the degree…
How to Speak Chemistrian: Crash Course Chemistry #11
— Learning to talk about chemistry can be like learning a foreign language, but Hank is here to help with some straightforward and simple rules to help you learn to speak Chemistrian like a native. — — Transcript Provided by YouTube: 00:00 Imagine you wake up one morning, and you’re under a tree, and…
The Market Revolution: Crash Course US History #12
— In which John Green teaches you about the Market Revolution. In the first half of the 19th century, the way people lived and worked in the United States changed drastically. At play was the classic (if anything in a 30 year old nation can be called classic) American struggle between the Jeffersonian ideal of…
Redox Reactions: Crash Course Chemistry #10
— All the magic that we know is in the transfer of electrons. Reduction (gaining electrons) and oxidation (the loss of electrons) combine to form Redox chemistry, which contains the majority of chemical reactions. As electrons jump from atom to atom, they carry energy with them, and that transfer of energy is what makes all…
The War of 1812 – Crash Course US History #11
— In which John Green teaches you about the War of 1812. The War of 1812 was fought between the United States and its former colonial overlord England. It started in, you guessed it 1812. The war lasted until 1815, and it resolved very little. John will take you through the causes of the war,…
Precipitation Reactions: Crash Course Chemistry #9
— A lot of ionic compounds dissolve in water, dissociating into individual ions. But when two ions find each other that form an insoluble compound, they suddenly fall out of solution in what’s called a precipitation reaction. In this episode of Crash Course Chemistry, we learn about precipitation, precipitates, anions, cations, and how to describe…
Thomas Jefferson & His Democracy: Crash Course US History #10
— In which John Green teaches you about founding father and third president of the United States, Thomas Jefferson. Jefferson is a somewhat controversial figure in American history, largely because he, like pretty much all humans, was a big bundle of contradictions. Jefferson was a slave-owner who couldn’t decide if he liked slavery. He advocated…
Acid-Base Reactions in Solution: Crash Course Chemistry #8
— Last week, Hank talked about how stuff mixes together in solutions. Today, and for the next few weeks, he will talk about the actual reactions happening in those solutions – atoms reorganizing themselves to create whole new substances in the processes that make our world the one we know and love. This week, we…
Where US Politics Came From: Crash Course US History #9
— In which John Green teaches you where American politicians come from. In the beginning, soon after the US constitution was adopted, politics were pretty non-existent. George Washington was elected president with no opposition, everything was new and exciting, and everyone just got along. For several months. Then the contentious debate about the nature of…