states of matter (chapter 5) Flashcards
definitions
1
Q
ideal gas
A
a gas whose volume varies in proportion to the temperature and in inverse proportion to the pressure.
2
Q
why does pressure of gas molecules increase as volume decreases?
A
the molecules of gas are constantly hitting the walls of the container, if we decrease the volume of a gas the molecule are squashed closer together and hit the walls of the container more often.
3
Q
enthalpy change of vaporisation
A
the energy required to turn one mole of a liquid into one mole of a gas.
