$1-$ Given the unary diagram of pure Magnesium below:

a$)$ Write at least five conditions to

describe this diagram $(5$P$)$

$($Critical point, phases, $V$ etc.$)$

mum

b$)$ Calculate the pressure

equivalence of $2$ bar in MPa

knowing that $76cmHg$ weight is

nearly equal to $1$ bar for a cross

section of $1c{m}^2.(5$P$)$

c$)$ Calculate approximately the

latent heat of vaporization $(H_v)$

at $1$ bar for which liquid Dvapor

transformation is exponential of the form $P=A{e}^{{}_{\frac{H}{R}T}}(A$ is a constant$).($Hint: $2$

equations with $2$ unknowns$)(5$P$)$

d$)$ What are the practical importance of phase diagrams in industry? $(5$P$)$