What is the difference between heating curve and cooling curve?What is the difference between heating curve and cooling curve?

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Heating curves aren’t like any other graphs, they have a story to tell about a substance. In this simulation, you will be generating the heating curve for water and ethanol through a small experiment of your own. You will observe the substance upon heating and correlate these observations to the data recorded on the heat curve.

What is the length of the line of the heating curve?What is the length of the line of the heating curve?

The length of the line of the heating curve for water at 100 °C is the amount of heat required to change all of the liquid into a gas. This heat is called the change in enthalpy of vaporization, ΔH vap. Vaporization is a specific scientific term for changing a pure liquid into the gas phase.

How do you make a cooling curve with salol and stearic acid?How do you make a cooling curve with salol and stearic acid?

You are likely to have used salol or stearic acid in a school practical lesson to make your own cooling curve. Salol has a melting point of about 45°C and stearic acid has a melting point of about 69°C. They are easily melted in a boiling tube placed in a beaker of hot water.

image-What is the difference between heating curve and cooling curve?What is the difference between heating curve and cooling curve?

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