CHEM 030A Lecture Notes - Lecture 2: Kinetic Energy, Junkers J 1, Heat Capacity
25 Sep 2017
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Document Summary
Comes from food we consume; enables us to do work. Heat and energy: heat is also called thermal energy. Is associated with the motion of particles. Adding heat to food increases the motion of particles, which makes the food hot. Heat is measured in joules, or calories. Example: 4. 184 joules (j) = 1 calorie (cal) (exact) Temperatures of 36. 1c are common in the morning and can climb to a high of 37. 2c. Temperatures above 37. 2c for a person at rest are usually an indication of disease. Matter is organized by its components: elements, compounds, and mixtures. Anything that has mass and occupies constant composition contain atoms of only elements that are chemically combined one type space in a definite ratio. Can be classified as an element or a compound. Can be classified as a pure substance or mixture. Table salt is a compound that contains both elements sodium and chlorine. Substances that can be separated by physical methods.
