You are given the melting point and boiling point of an unknown substance. You are to create a heating curve from the data provided below. You may describe how to graph it if you can't graph it.
Here is the data for you to use to create your heating curve:
Melting point = 45°C
Boiling point = 85°C
Minimum temperature = 0°C
Maximum temperature = 110°C
Energy is absorbed but there is no numeric data to add, just include the unit for energy in your axis label
Here is the point breakdown for your heating curve:
Heating curve title (1 pt)
The heating curve size is appropriate for the size of the graph paper (1 pt)
The x and y axes are labeled with the name and units of each variable (4 pts)
The independent and dependent variables are assigned to the appropriate axes (2 pts)
The scaling of each axis is appropriate and has consistent intervals starting at zero on both axes (4 pts)
The data are plotted correctly (2 pts)
The heating curve is drawn correctly (1pt)
To create the heating curve based on the given data, follow these steps:
1. Begin by labeling the x-axis as "Temperature (°C)" and the y-axis as "Energy Absorbed (Joules)."
2. On the x-axis, start at 0°C and go up to 110°C with consistent intervals.
3. On the y-axis, start at 0 Joules and go to an appropriate maximum value corresponding to the energy absorbed during the entire heating process.
4. Place a point at (45°C, Energy absorbed at melting point) to represent the melting point.
5. Draw a horizontal line from this point to show the energy absorbed during the melting process.
6. Place a point at (85°C, Energy absorbed at boiling point) to represent the boiling point.
7. Draw another horizontal line from this point to show the energy absorbed during the boiling process.
8. Connect the two horizontal lines to form the heating curve.
9. Make sure the curve is smooth and appropriately reflects the energy absorbed throughout the heating process.
By following these steps, you can create a heating curve for the unknown substance based on the melting and boiling points provided.
What are the numbers for y axis
Since there are no specific numeric data provided for the energy absorbed during the heating process, you can label the y-axis with general units such as "Energy Absorbed (Joules)" without including numerical values. This will indicate that the y-axis represents the amount of energy absorbed during the heating process without assigning specific numerical values.
how many spaces should the line go up from 45 c to 80 c if there is no numbers on the y axis
If there are no specific numbers provided on the y-axis, you can still visually represent the energy absorbed during the heating process by using a qualitative scale. For example, you can divide the y-axis into sections or segments to represent the relative amount of energy absorbed.
In the context of going from the melting point at 45°C to the boiling point at 85°C, you can visually represent the increase in energy absorbed by showing the heating curve rising from the melting point to the boiling point. The vertical distance covered by the curve can indicate the relative increase in energy absorbed without assigning specific numerical values.
So, the heating curve should go up from 45°C to 80°C based on the given information about the melting and boiling points, but the actual distance can be qualitative or visually represented without specific numeric values on the y-axis.
So I can put the melting point for 45 c at the lowest point on the y axis, and it can move up 6 squares to the 80 c and still be correct?
Yes, that's correct. Without specific numerical values on the y-axis, you can use a relative scale to represent the increase in energy absorbed as the temperature rises from the melting point at 45°C to the boiling point at 85°C. As long as the heating curve visually shows an increase in energy absorbed from the melting point to the boiling point, you can use a qualitative scale where moving up 6 squares on the y-axis could represent this increase accurately.
Would the line for the melting point at 45c connect to the one at 80c?
and if so, would the line for the boiling point also do this?
and do you think the melting point of the boiling point would take longer.
In a typical heating curve graph, the line for the melting point at 45°C would not connect directly to the line for the boiling point at 85°C. The reason for this is that during the phase change from solid to liquid (melting) at the melting point, there is a plateau where the temperature remains constant even though energy is being absorbed to change the phase. Once the substance has completely melted, the temperature then begins to rise again until it reaches the boiling point.
Similarly, at the boiling point, there is another plateau where the substance changes from liquid to gas (vaporization), and the temperature remains constant as energy is absorbed for the phase change. After all the substance has been vaporized, the temperature will continue to rise.
Regarding your question about which phase change (melting or boiling) would take longer, it typically takes longer for a substance to reach the boiling point and undergo vaporization than it does to melt. This is because vaporization generally requires more energy and hence more time compared to melting.
So, in summary, on a heating curve graph:
- The line for the melting point at 45°C would have a plateau before the temperature rises to the boiling point at 85°C.
- The line for the boiling point would also have a plateau before the temperature rises further as the substance vaporizes.
- Vaporization at the boiling point would generally take longer than the melting process.