Laws of thermodynamics apply only when a system is in equilibrium or moves from one equilibrium state to another equilibrium state. In this sixth unit of class 11 chemistry, we answer some of the important questions like: How do we determine the energy changes involved in a chemical reaction/process? Will it occur or not? What drives a chemical reaction/process? To what extent do the chemical reactions proceed? Also, we learn about types of systems, calculate work done, enthalpy & enthalpy change, entropy, spontaneity, and Gibbs free energy.
Curated by: Khan Academy India - English (29 videos)
This video talks about the definition of the standard enthalpy of combustion. It also helps us identify the relationship between the standard enthalpy of combustion and the calorific value for a given fuel. This helps us compare different fuels. 00:00- Introduction 2:14- Is combustion enthalpy always negative? 2:34- Comparing fuels using combustion enthalpy values. 4:13- Calculating enthalpy of formation using combustion enthalpy values. Practice this concept - “https://www.khanacademy.org/science/physical-chemistry-essentials/x98cdf762ed888601:thermodynamics/x98cdf762ed888601:enthalpy-changes-for-other-processes/e/standard-enthalpy-changes-for-combustion-and-atomisation” Check out more videos and exercises on “Thermodynamics” - https://www.khanacademy.org/science/physical-chemistry-essentials/x98cdf762ed888601:thermodynamics To get you fully ready for your exam and help you fall in love with “Chemistry”, find the complete bank of exercises and videos for “Class 11 Chemistry” here -https://www.khanacademy.org/science/class-11-chemistry-india Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages. Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy. Subscribe to our YouTube channel - https://www.youtube.com/c/khanacademy As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Created by Jitin Nair