8. thermal properties of matter

Question 1

internal energy

Answer 1

energy store made up of total microscopic kinetic energy associated with random motion of particles and total potential energies of all particles in system

Question 2

potential energy

Answer 2

depends on separation between particles.

further the particles, higher the potential energy

Question 3

microscopic kinetic energy

Answer 3

due to speed of particles and is directly proportional to temperature of a body

higher temperature = higher average speed of particles = higher internal kinetic energy

Question 4

transfer of thermal energy and internal energy

Answer 4

via conduction, convection, and radiation

transferred from internal thermal store of hot body to internal thermal store of another cooler body due to temp diff.

after energy transferred to cooler body, energy go towards increasing kinetic and potential energy of particles

increase in KE = increase in temperature

Question 5

kelvin scale formula

Answer 5

T (in K) = ø (in °C) + 273

relationship between K and °C:
difference between any 2 temperatures on °C is same as when converted to K, and vice versa