Question

The isobaric temperature-composition (T–X) phase diagram given below shows the phase relation between components M and N. The equilibrium melting undergone by the rock R to generate the liquid of composition L is .............. % (In integer )

Hint:

To determine the equilibrium composition of a phase, identify the phase boundary on the phase diagram corresponding to the temperature and composition.

Answer 1

Step 1: Identifying the key information from the phase diagram.
The equilibrium melting composition is represented on the phase diagram at the intersection point of the isobar and the phase boundary between the phases of rock R and the liquid phase L.
Step 2: Finding the composition of rock R and liquid L.
From the diagram, it is observed that the composition of rock R lies at approximately 40% M and 60% N. Similarly, the liquid phase L corresponds to a composition of approximately 80% N and 20% M.
Step 3: Calculating the equilibrium melting composition.
From the given diagram, the equilibrium melting composition of the rock R generating the liquid L corresponds to a composition of 60% N (based on the composition of L).
Final Answer: \[ \boxed{60} \]