Middle school chemistry | Khan Academy - Phase changes | Middle school chemistry | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/ms-chemistry Want to explore more? Check out the full middle school playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HBnhjPgsJU2y1UhMwcYmb5u Phase changes are physical changes in which a substance shifts from one state of matter to another, like ice melting into water or water boiling into steam. These transformations depend on two factors: particle attractions and kinetic energy. Heating a substance increases particle motion, potentially overcoming attractions to change phases. Each substance has unique melting, freezing, and boiling points due to these forces. 00:00 Intro 00:22 What keeps particles together? (Attraction) 01:03 What makes them separate? (Kinetic energy) 2:00 Melting and melting point 3:43 Boiling and boiling point 4:35 Condensation and freezing 5:46 Why different substances have different melting & boiling points 6:55 Summary Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://donate.khanacademy.org/give/419869/#!/donation/checkout Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc