chap 10 and 11 Flashcards
0
Q
exothermic reaction properties
A
- -ive delta H
- releases energy to surroundings
- surroundings get hotter
1
Q
endothermic reaction properties
A
- +ive delta H
- gains heat from surroundings
- gets hotter
- surroundings get colder
2
Q
examples of exothermic reactions
A
- combustion reactions
- reactions in which single atoms bond together
- reactions in which an electron is gained by a positive ion
- changes in state of gas~> liquid
3
Q
endothermic reaction examples
A
- molecule is broken up to form single atoms
- reaction in which an atom or ion loses an electron
- changes in state from solid to liquid, liquid to gad
- photosynthesis
4
Q
measuring rate of reaction
A
- measuring the rate at which a reactant disappears
- measuring the rate at which a product is formed
5
Q
collision theory
A
- must collide
- must collide with a specific amount of activation energy
- the particles must collide with favourable orientation
6
Q
catalyst
A
- provides an alternative reaction pathway
- lower activation energy
- for a particular reaction
