Physics 2 Quiz 1

temperature

how fast on average the molecules of gas are going

how does speed of molecules relate to temperature?

faster moving molecules=higher temp

if there are 2 different systems with different amounts of molecules but the molecules are going the same speed, how does this affect the temperature and thermal energy of the systems?

• temperature: stays the same

• thermal energy: higher in system with more molecules

how does mass of molecules affect thermal energy?

larger molecules means there is more thermal energy

thermal energy

total sum of energy for all molecules

how is het transferred from object to object?

energy is transferred from hot object to cold object

is energy transferred between molecules with the same velocity?

no

is energy transferred betwen molecules with different velocities?

yes

1st law of thermodynamics

• energy is conserved

• 2 ways to change thermal energy in a system: work and heat

how can thermal energy be lowered?

• the system does work in the environment

• the system gives Q (heat) to the environment