Energy changes Flashcards
(26 cards)
Exothermic energy where
Surroundings
Endothermic energy where
take in
Energy conserved in chemical reactions?
yes
Combustion reaction
Exothermic
Oxidation reaction
Exothermic
hand warmers xn
Endothermic
ice pack xn
endothermic
A substance which can be dissolved
“Soluble”?
A substance which cannot be dissolved
“Insoluble”?
2 solutions and an insoluble solid makes
Precipitate
salts of sodium s/i
Soluble
What are Nitrates? s/i
Soluble
Precipitates and partner relationship
They swap partners
consists only of one element or one compound
Pure
Impure compounds have a range of melting points and boiling points?
Yes
pure compounds have definite melting points and boiling points.?
yes
Separates a soluble solid from a solution
crystalisation?
separate mixtures of soluble compounds and identify them
chromatography?
moblile phase?
Where the molecules can move
stationary phase?
Where the molecules can’t move
A process to separate a mixture of liquids
fractional distilation?
A process that separates out a liquid from a solution
simple distilation?
two or more different substances
mixture?
mixture chemically joined?
no
