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Isobaric cubic expansion coefficient

Values for calculation

$τ$
$γ_{πτ}$
$γ_π$
$T$ $\mathrm{°C}$
$π$
$γ^r_π$
$γ^r_{πτ}$
$\text{Region}$

Calculation

Isobaric cubic expansion coefficient

$\text{if }\ \text{Region}= 1$
$$α_ν=\cfrac{1-\cfrac{τ\cdot γ_{πτ}}{γ_π}}{\left(T+273.15\right)}$$
$\text{else if }\ \text{Region}= 2$
$$α_ν=\cfrac{1+π\cdot γ^r_π-τ\cdot π\cdot γ^r_{πτ}}{\left(1+π\cdot γ^r_π\right)\cdot\left(T+273.15\right)}$$
$\text{else}$
$$α_ν=0$$