Question

if the absolute pressure of carbon dioxide in a restaurant carbonation system is 690 kPa, determine the gauge pressure in pascals.

Answer 1

`\begin{gathered} P_(abs)=690KPa \\ P_(gauge)=? \\ P_(abs)=P_(atm)+P_(gauge) \\ \text{Solving }P_(gauge) \\ P_(gauge)=P_(abs)-P_(atm) \\ P_(atm)=101.3\text{ Kpa} \\ P_(gauge)=690KPa-101.3\text{ Kpa} \\ P_(gauge)=588.7KPa=588,700Pa \\ \text{The gauge pressure is }588,700Pa \end{gathered}`