Question

Heating/Cooling Curve for an Unknown Substance Heating/Cooling Curve for Water

Heating/Cooling curve for 1 kg of an unknown substance at standard pressure
Graph courtesy of Lisa Staley, VirtualSC instructor


Heating/Cooling curve for 1 kg of water at standard pressure




What is the difference in temperature (°C) between the freezing point of the unknown substance and the freezing point of water?

What is the difference in temperature (°C) between the boiling point of the unknown substance and the boiling point of water?

Answer 1

The difference in temperature between the freezing point of the unknown substance and the freezing point of water is 20°C.

To determine the difference in temperature (°C) between the freezing point of the unknown substance and the freezing point of water, we need to compare the freezing points of the two substances.

From the given information, we can see that the unknown substance has a freezing point of approximately -20°C, while the freezing point of water is 0°C.

Therefore, the difference in temperature between the freezing point of the unknown substance and the freezing point of water is:

0°C - (-20°C) = 20°C

So, the difference in temperature between the freezing point of the unknown substance and the freezing point of water is 20°C.