Reactivity Flashcards
(17 cards)
what is a physical change
change in shape or state - mostly reversable
what is a chemical change
new product and energy can be released - usually irreversible
what is implosion
collapse of an object into itself from pressure
what are explosives
a substance or device that when triggered by heat, impact or friction, rapidly releases a large amount of energy
what is pressure
is a measure of how concentrated a force is
heating copper carbonate causes what?
solid to liquid
green to black and a chemical change
what is the word equation for the reaction of metal with water
metal + water - metal hydroxide + hydrogen
what is the word equation for the reaction with metals and oxygen
metal + oxygen - metal oxide
what is the word equation for the reaction of metals with acid
metal + acid - salt + hydrogen
what an exothermic reaction
When energy is transferred to the surroundings, this is called an exothermic reaction and usually feels hot.
what is an endothermic reaction
An endothermic chemical reaction is when it takes in heat from the surroundings
example of exothermic
burning
boiling water
example of endothermic
melting ice
what is the reactivity series of metals
it is a list of metals in order of reactivity, with the most reactive at the top.
what is a solid
particles close together in a fixed arrangment
what is a liquid
no longer in a regular shape but are still together
what is a gas
particles are moving around very quickly with lots of empty space in between.
