Energy Diagrams (thermo) Flashcards
on a phase change graph what does the x axis represent
reaction coordinate
what does a change in kinetic energy cause
a change in temperature
what happens to temperature at each phase change point
it stays the same
if two things are at the same temperature what happens to their kinetic energy
it becomes the same
is the temperature higher or lower when kinetic energy quantities are high
higher
what happens to a substances potential energy when it changes states
potential energy stays the same because it is the same substance that is involved
if the change in potential energy is endothermic, what is the change in kinetic energy
exothermic (the opposite)
what does the delta H line on a graph represent
the di8fference between the potential energy of the products and that of the reactants
if the change in potential energy is exothermic, what is the change in kinetic energy
endothermic (the opposite)
what does a upwards line in a phase change graph show
that energy is being taken in (the temperature is increasing)
when potential energy quantities decrease what happens to kinetic energy quantities
they increase (inverse relationship)
what way does the graph go in an exothermic reaction
reactants are higher then products
which way does the graph go in an endothermic reacton
reactants are lower then products
what does the vertical line between the products and the reaction pathway axis represent
potential energy of all the products bonds
what is the label for the bottom axis
reaction pathway or reaction coordinate
