energy changes Flashcards
what happens during a exothermic reaction
if reaction gets hot
there must be a decrease in potential energy
results in a net increase in kinetic energy
what is the arrow that connects reactants and products
net energy out/in
what is activation energy
minimum required energy for a reaction to take place
what is the neutralisation practical
use a polystyrene cup(good for insulation) and place a thermometer inside it
put acid and a alkali on the cup
measure max temperature
repeat steps while increasing the volume of alkali
draw a graph where the y axis is max temperature and the x axis is volume of alkali
where both line of best fits meat is the volume needed for the reaction
what does green calcium carbonate and sulphuric acid produce
blue copper sulfate crystals
what are 3 observations from this practical
colorless solution
fizzing
green powder
how can anything in excess be removed
filtration
