Heating And Cooling Graphs That Include Changes Of State

Heating curves show how the temperature changes as a substance is heated up.

Heating and cooling graphs that include changes of state.

A heating or cooling curve is a simple line graph that shows the phase changes a given substance undergoes with increasing or decreasing temperature. Notice that the temperature stays the same during the state change freezing and this is the melting point. Https www freesciencelessons co uk workbooks in this video we look at heating and cooling curves. The sloped areas of the graph represent a.

The ice could then be cooled to some point below 0 c. This could be diagrammed in a cooling curve that would be the reverse of the heating curve. A heating curve for ice the temperature stays the same when a solid is melting or a liquid is boiling changing state during a change of state even though heat energy is being absorbed. For example liquid water turns into steam when it is heated enough and it turns into ice when it is cooled.

The diagram shows a cooling curve for salol. If a heater of known power is used such as a 60 w immersion heater that provides 60 j s the temperature of a known mass of. Substances can change state usually when they are heated or cooled. We look at what happens.

Summary of state changes. Interpret heating and cooling graphs that include change of state reading heating and cooling curves examples and step by step solutions gcse igcse physics notes. Find my revision workbooks here. Latent heat can be measured from a heating or cooling curve line graph.

All of the changes of state that occur between solid liquid and gas are summarized in the diagram in the figure below. Just like heating curves cooling curves have horizontal flat parts where the state changes from gas to liquid or from liquid to solid. Plot a graph of temperature against time. Cooling curves are the opposite.