s2 chap 4: chemical changes
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
chemical change characteristics
new substance(s) is formed chemical composition is changed chemical changes are difficult or impossible to reverse
physical change characteristics
no new substance formed only change in physical properties, not chemical composition physical changes are mostly reversible
is cellular respiration classifed as a physical or chemical change
chemical
what is the result of a chemical reaction
chemical change
what are the substances that are present at the start of the chemical reaction called
reactants
what are substances produced by chemical reactions called
products
are new atoms created during a chemical reaction
no
are atoms destroyed in a chemical reaction
no
what is (aq)
substances dissoved in water
what is neutralisation
two or more substances (acid and base) reacting when mixed together without the need for heating
what is thermal decomposition
process where a substance is broken down into two or more simpler substances by the effect of heat
what is rusting
chemical change involving oxygen
what is combustion
comination of a substance with oxygen in the presence of heat, producing one or more new substances
what is cellular respiration
processes in which living cells of plants and animals take in oxygen to release energy stored in glucose
chemical change involving mixing substances
neutralisation
chemical change involving heat
thermal decompostion, cooking
chemical change involving oxygen
rusting combustion cellular respiration
what is cooking
chemical change involving heat (eg. when cooking an egg, proteins are denatured by heat and change colour and texture)
what is photosynthesis (chemical change)
process where plants convert the energy of sunlight into stored chemical energy by forming carbohydrates from carbon dioxide in the air and water, and releasing oxygen as a byproduct.
chemical change involving light
photosynthesis
chemical change involving electric current
electrolysis electroplating
electrolysis
chemical decomposition of substance when electric current passes through it
electroplating
process in which a suvstanceis coated with metal with a passage of electric curent
what is an acid
a substance that produces H+ ions in water as the only positive ion