fun facts Flashcards
what are ways energy can be transferred
heat
work
heat
energy that is transferred as a result of temperature differences
work
a result of motion against an opposing force
a change in the system causessss
the opposite change for the surroundings
intensive property meaning
doesn’t depend on the other quantity of the substance present
extensive property
does depend on the quantity of substance present
chemical system classification
isolated
closed
open
what is enthalpy change
the energy transferred as heat by a chemical change at constant pressure.
when a piston is moved due to gases expanding, we say that energy is transferred to the surroundings as a result of
expansion work.
volume changes are most commonly seen in chem reactions involvingggg
gasessssss
if a system is heated it’s energy
increases
if a system does work it’s energy
decreases
if work is done on a system, energy
increases/ is gained/ is +
if work is done by a system energy
decreases / is negative / is lost
heating a system makes it
gain energy