(Solved):   Use the phase diagram of Substance \( X \) below to find the melting point of \( X \) when ...

 

Use the phase diagram of Substance \( X \) below to find the melting point of \( X \) when the pressure above the solid is \( 1.6 \) atm. temperature ( \( K \) ) Note: your answer must be within \( 12.5{ }^{\circ} \mathrm{C} \) of the exact answer to be graded correct.