Final answer:
The temperature of wax that has just changed from liquid to solid is at its freezing point, which is 53°C, where both liquid and solid states coexist momentarily during the phase transition.
Step-by-step explanation:
When wax changes from liquid form to solid form, the temperature of the wax is at its freezing point. Given that Tony says the freezing point of wax is 53°C, the wax that has just changed from liquid to solid would be at this temperature. This is because at a substance's freezing point, which is the same as its melting point, the liquid phase and solid phase can exist simultaneously. The temperature does not change during the phase transition; instead, the state of the substance changes from liquid to solid as the wax releases heat.