Thermodynamics Questions Flashcards
(14 cards)
When something heats up, does it move slower or faster?
It moves faster
When something cools down, does it move slower or faster?
It moves slower
Do hotter things have more energy than colder things?
No. Temperature cannot determine energy.
What is the molecule for water and what atoms are in it?
H2O, there are two hydrogen atoms and one oxygen atom
What happens to molecules at absolute zero?
They move very slowly
What is temperature the measure of?
The average kinetic energy of the molecules
For two things having equal temperature and one having more molecules than the other, will the one with more molecules have more or less kinetic energy (thermal energy) than the other?
The thing with more molecules will have more kinetic energy
What is it called in a system when the average kinetic energy (temperature) equals the total kinetic energy?
Equilibrium
When a thing gets hotter, what happens to the molecules and the kinetic energy?
The molecules move faster and they have more kinetic energy
When a thing gets colder, what happens to the molecules and the kinetic energy?
The molecules move slower and they have less kinetic energy
What happens to molecules when to things are in contact?
Their molecules collide and kinetic energy transfers from the faster moving molecules to the slower moving molecules
Can energy be created or destroyed?
No, energy transfers, it increases in one part of a system and decreases in another part of the system
What is equilibrium?
Molecules of a system will transfer energy until the system reaches a stable state, known as equilibrium, in which all of the molecules are moving about the same speed.
What happens to a thing when it loses or gains energy?
The energy gained or lost is divided among all of the molecules of the thing
