at what temperature does the solid start melting?\n-20°c\n0°c\n20°c\n80°c
at what temperature does the solid start melting?\n-20°c\n0°c\n20°c\n80°c
Answer
Explanation:
Step1: Identify the melting phase on the graph.
Melting is the process where a solid turns into a liquid. On a heating curve, this phase change occurs at a constant temperature, represented by a horizontal plateau after the initial heating of the solid. In the given graph, the first horizontal plateau occurs between time = 1 min and time = 2 min.
Step2: Determine the temperature at which melting occurs.
Read the temperature value corresponding to this horizontal plateau from the y-axis. The graph shows that the temperature remains constant at $0^\circ C$ during this time interval (1 min to 2 min). This constant temperature is the melting point, the temperature at which the solid starts melting.
Answer:
$0^\circ C$