I set a condition to describe a formula but I am not able to make a line feed. How can I change my condition that this is possible. 

```
\usepackage[utf8]{inputenc}
\usepackage{tabularx}
%____________________________________________________________________________________________________________
\newenvironment{conditions}
  {\par\vspace{\abovedisplayskip}\noindent\begin{tabular}{>{$}l<{$} @{${}={}$} l}}
  {\end{tabular}\par\vspace{\belowdisplayskip}}
%____________________________________________________________________________________________________________
\begin{document}
\begin{conditions}
    \mu_{j}^{(i)} \mathrm{d}N_{j}^{(i)} &  infinitesimal change in entropy in amount of substance from each component (i = component \&  j = phase) 
\end{conditions}
\end{document}

```