1) Physical change as the compound is the same in a solid and a liquid; the compound is still H2O
2)
a) The particles will be close together in a regular arrangement
b) The particles in a solid form a regular lattice arrangement because there are strong forces of attraction between the particles in a solid
c) The particles will vibrate more around their fixed position; the energy in the particles kinetic energy stores will increase
3)
a) The particles will be fairly close together
b) The particles will be far apart
4)
a) Gas
b) Solid
1) If H2O was to change state from solid (ice) to liquid (water), would that be a physical or chemical change? Explain your answer.
2)
a) Draw the arrangement of the particles in a solid.
b) Describe the arrangement of the particles in a solid and explain why the particles have this arrangement.
c) What happens to the particles in a solid as the temperature of the solid increases? The temperature is not increased beyond the melting point, which means that no change of state takes place.
3)
a) Draw the arrangement of the particles in a liquid.
b) Draw the arrangement of the particles in a gas.
4) We are now going to look at water in the three states; solid, liquid and gas.
a) In which state do the water molecules have the most energy?
b) In which state do the water molecules have the least energy?