particle model of matter

Question 1

Internal energy diagram?

Answer 1

solid-(latent heat of fusion)-liquid-(latent heat of vaporisation)-gas

Question 2

Internal energy?

Answer 2

heating a material from a solid, internal energy increases. when temp increases, so does kinetic energy. when the material changes state, the potential energy changes. No change in temp when the state changes.

Question 3

force/pressure?

Answer 3

the force (pressure) is dependent on how often particles bounce off of each other and the walls and how much kinetic energy they have. (move randomly)

Question 4

density?

Answer 4

how closely packed the mass is in a material- mass divided by volume.

Question 5

specific heat capacity?

Answer 5

amount of energy required for the temp of 1kg to heat a substance by 1 degree.

Question 6

specific latent heat?

Answer 6

amount of energy required to change the state of 1kg of substance

Question 7

Internal energy definition?

Answer 7

sum of total kinetic energy and potential energy of the particles in a material

Question 8

changes of state?

Answer 8

solid-liquid= melting
solid-gas= sublimation
liquid-solid= freezing
liquid-gas= evaporation
gas to solid= deposition
gas to liquid= condensation

Question 9

pressure in gases?

Answer 9

pressure is always 90 degrees to the surface
If volume increases, pressure decreases
If temp is constant, product of pressure and volume will always be a constant value.

Question 10

increasing pressure?

Answer 10

If volume decreases (like squeezing a balloon) speed of container colliding with particles can transfer energy to particles
This is classed as ‘doing work’.

If energy is transferred to the gas, likely to increases the kinetic energy
If kinetic energy increases, temp goes up bcs temp is related to the average kinetic energy of particles.