Answer:
Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases.
Step-by-step explanation:
The temperature is constant during a phase change (melting or boiling), so the graph is a horizontal line.
The temperature increases when a single phase (solid, liquid, or gas) is heated, so the graph for these changes has an upward slope.
A is wrong. A horizontal line shows a constant temperature.
B is wrong. There are no vertical lines in a heating curve.
D is wrong. A horizontal line does correspond to an increase in temperature.
Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. Hence, option C is correct.
Temperature is a physical quantity that expresses hot and cold or a measure of the average kinetic energy of the atoms or molecules in the system.
If you are told to make a graph of "temperature vs. time", that means the temperature is on the y-axis and time is on the x-axis.
Step-by-step explanation:
The temperature is constant during a phase change (melting or boiling), so the graph is a horizontal line.
The temperature increases when a single phase (solid, liquid, or gas) is heated, so the graph for these changes has an upward slope.
A is wrong. A horizontal line shows a constant temperature.
B is wrong. There are no vertical lines in a heating curve.
D is wrong. A horizontal line does correspond to an increase in temperature.
Hence, option C is correct.
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