4.2 Physical And Chemical Properties Flashcards
Cohesion
A property where water droplets form on an non absorbent surface
Adhesion
The property where water sticks to something
Ie mopping
Physical property
A characteristic of a substance that can be observed or measured and determined without changing the composition of that substance
Chemical property
The ability of a substance to change into a new substance Ex Endothermic Exthermic Creates a precipitate
Chemical change
A change that results in the formation of a new substance or new substances
Chemical reaction
The process of which a chemical change occurs
Combustibility
The ability of a substance to react quickly with oxygen to produce heat and light
Endothermic
A reaction that causes a substance to absorb heat ex cold packs
Exothermic
A chemical reaction that causes a substance to emit heat and light
Qualitative property
A property of a substance that is not measured and has no numerical value
Ex colour
Door texture
Quantitative property
A property of a substance that is measured and has numerical value
Temperature
Height mass
Physical change
A change in which the composition of a substance remains unaltered and no new substances are produced
Oxygen gas test
Decompositional
MnO2 is a catalyst which is Macanese dioxide
Increases the rate at which hydrogen perioxide breaks down into water and oxygen
Carbon dioxide
Double displacement reaction To decompostional reaction Acetic acid CH3COOH And sodium hydrogen carbonate Na HCO3 Displaces to make H2CO3 carbonic acid And NaC2H3O2 sodium acetate solid precipitate Since carbonic acid is very unstable it decomposes into CO2 and H2O
Hydrogen gas
Single displacement reaction
Zn mossy zinc
And HCl hydrochloric acid react
Pure elements are substituted for one another
Does zinc chloride and and hydrogen gas H2 and ZnCl2
