Chemistry 2 Flashcards
Difference between exothermic and endothermic reaction
in an exothermic reaction
energy is released in the form of heat, light etc
in an endothermic reaction
energy is absorbed in the form of heat etc
what is activation energy
activation energy is the amount of energy required to kickstart a chemical reaction
referred to as Ea
net change of energy before and after (reactants and products)
delta H or ΔH
what is electolytic decomposition
uses electricity as energy for the reaction
also known as electrolysis
what is the reaction rate
how fast a reaction proceeds
what is combustion
chemical reaction that requires a fuel that reacts with oxygen
what is collision theory
atoms and molecules must collide in the same orientation and enough energy for chemical reaction to occur
5 factors that contribute to collision theory
mixing or stirring concentration surface area catalyst heat or temperature
what is an oxidation reaction
a reaction involving bonding oxygen to another substance
what is a reduction reaction
a reaction involving removing oxygen from another substance
what is a polymer
polymers are giant molecules made up of long chains of monomers
give 3 examples of naturally occurring polymers
cellulose, dna, protein
thermoplastic vs thermosetting
thermoplastic = coles plastic bag
thermosetting = ps4
thermoplastics can be melted down and reshaped
what is a codon
a codon is a triplet of rna bases which codes individual amino acids
what are polypeptides
chains of amino acids
