$2.$ A certain $25-$L gas was initially at $35\backslash$deg C and $6\mathrm{.}3$ atm. The gas is then compressed to $18\mathrm{.}6$ atm at constant temperature. Determine the change in entropy in J$/$K$.$

Formula to convert Celsius to Kelvin is given by:

K $=\backslash$deg C $+273\mathrm{.}15$

Answer Format: $[2$ decimals$]$