Science, Tech, Math › Science Chemical Change Examples Share Flipboard Email Print ThoughtCo. / Hugo Lin Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated January 09, 2020 Chemical changes involve chemical reactions and the creation of new products. Typically, a chemical change is irreversible. In contrast, physical changes do not form new products and are reversible. Common Chemical Changes The rusting of ironCombustion (burning) of woodThe metabolism of food in the bodyMixing an acid and a base, such as hydrochloric acid (HCl) and sodium hydroxide (NaOH)Cooking an eggDigesting sugar with the amylase in salivaMixing baking soda and vinegar to produce carbon dioxide gasBaking a cakeElectroplating a metalUsing a chemical batteryThe explosion of fireworksRotting bananasGrilling a hamburgerMilk going sour While it's not always easy to tell a chemical change has occurred (as opposed to a physical change), there are some telltale signs. Chemical changes may cause a substance to: Change colorChange temperatureProduce bubblesProduce precipitate (in liquids) Chemical changes can also be considered to be any phenomenon that allows a scientist to measure chemical properties.