energetics Flashcards
define exothermic, what happens to the temperature?
energy is released during a reaction
temperature increases
define endothermic, what happens to the temperature
energy is absorbed during a reaction
temperature decreases
what is enthalpy?
the energy stored in chemicals that can be released as heat (stored in the BONDS)
what is enthalpy of combustion?
the heat that is given out when 1 mole of a substance burns completely in the presence of oxygen
which enthalpy apparatus is not the same as all the others?
enthalpy of combustion has a unique setup to other reactions
describe the apparatus for general enthalpy experiments
a polystyrene cup is filled with water, a
why is polystyrene used as a calorimeter?
it provides better insulation than a typical glass beaker
it avoids energy gain or loss
what is a neutralization reaction?
one in which an acid and a base react together to form water
(and salt)
what is enthalpy of neutralization?
the enthalpy change when 1 mole of WATER forms from acid and base
