construct a heating curve for a substance that is heated to 150 deg centigrade. The substance is originally solid at 35 deg c, melts at 75 deg c and boils at 126 dec c
this is a time/temperature plot
the line slopes up from 35 to 75
while the solid warms up
the line levels off at 75
while the solid melts
phase change
the line slopes up from 75 to 126
while the liquid warms up
the line levels off at 126
while the liquid boils
phase change
the line slopes up from 126 to 150
while the gas warms up
To construct a heating curve for a substance, we need to plot temperature on the y-axis and time on the x-axis. The curve will show the changes in temperature as the substance is heated.
Given the information provided, we can start by plotting the initial temperature of the substance, which is 35 degrees Celsius. This will be a point on the graph.
Next, we need to show the phase change from solid to liquid, which occurs at the melting point of 75 degrees Celsius. We draw a horizontal line on the graph at this temperature, indicating that the temperature remains constant while the solid substance is melting into a liquid.
Once the substance has completely melted, we continue heating it. We can start increasing the temperature gradually until we reach the boiling point of 126 degrees Celsius. We draw a diagonal line from the end of the horizontal line representing the melting point to the boiling point, indicating a gradual increase in temperature during this phase.
Finally, after reaching the boiling point, we draw another horizontal line at the boiling point temperature. This represents the temperature at which the substance is boiling and changing from a liquid to a gas. The boiling phase will continue until all the substance has vaporized.
Remember, the heating curve is a representation of the temperature changes during the heating process, so the duration of each phase is not given. However, the general shape of the curve can be based on the provided temperatures.