The volume of a dry box (a closed chamber with dry nitrogen flowing through it) is 2.0 m3. The dry box is maintained at a slight positive gauge pressure of 10 cm H2O and room temperature (25°C). If the contents of the box are to be replaced every five minutes, calculate the required mass flow rate of nitrogen in g/min by

(a) Direct solution of the ideal gas equation of state and

(b) Conversion from standard conditions.