Respuesta :
Answer:
explained
Explanation:
in the attachment is the image of Cu-Ni phase diagram and a vertical line constructed at a composition of 70 wt% Ni-30 wt% Cu
(a) Upon heating from 1300°C, the first liquid phase forms at the temperature at which this vertical line intersects the ?-(? + L) phase boundary--i.e., about 1345°C
(b) The composition of this liquid phase corresponds to the intersection with the (? + L)-L phase boundary, of a tie line constructed across the ? + L phase region at 1345°C--i.e., 59 wt% Ni;
(c) Complete melting of the alloy occurs at the intersection of this same vertical line at 70 wt% Ni with the (? + L)-L phase boundary--i.e., about 1380°C;
(d) The composition of the last solid remaining prior to complete melting corresponds to the intersection with ?-(? + L) phase boundary, of the tie line constructed across the ? + L phase region at 1380°C--i.e., about 79 wt% Ni.
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The temperature at which the first liquid phase forms is approximately equal to 1345°C.
Given the following data:
- Initial temperature = 1300°C.
- Final temperature = 2370°F.
What is temperature?
Temperature can be defined as a measure of the degree of hotness or coldness of a physical body (object). Also, temperature is measured by using a thermometer and its units are:
- Celsius (°C)
- Kelvin (K)
- Fahrenheit (°F)
Based on the phase diagram (graph) of the temperature and composition of copper-nickel alloy, we can deduce the following points:
- The temperature at which the first liquid phase form is approximately equal to 1345°C, which is where the vertical line and the [tex]\alpha -(\alpha + L)[/tex]phase boundary intersects.
- The composition of this liquid phase is equal to 59 wt% Nickel, which is where the [tex]\alpha + L[/tex] phase region and the [tex](\alpha + L)-L[/tex] phase boundary intersects.
- The complete melting of the alloy occur at a temperature of approximately 1345°C, which is where the vertical line and the [tex](\alpha + L)-L[/tex] phase boundary intersects.
- The composition of the last solid remaining prior to complete melting is approximately equal to 79 wt% Nickel.
Read more on heat here: brainly.com/question/12072129
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