Bar
= Bar
{title2=$1\ \mathrm{bar}=10^5\ \mathrm{Pa}$}
A <pressure> unit defined by $1\ \mathrm{bar}=10^5\ \mathrm{Pa}$. In a logarithmic gas <thermodynamic activity>, a pressure expressed in <bars> must still be divided by the same-unit reference <pressure> to form a dimensionless ratio.