Gas Review Problem #5

5)  In an airplane flying from San Diego to Boston, the temperature and pressure inside the 5.544-m³ cockpit are 25^oC and 94.2 kPa, respectively.  How many moles of air molecules are present?

Convert m³ to dm³:

        x dm³  =  5.544 m^{3    =}  5544 dm³

Write given information:

•         V  =  5.544 m³  =  5544 dm³                              
•         T  =  25 ^oC  +  273   =  298 K     
•         P  =  94.2 kPa                             
•         R  =  8.314 kPa L / mol K           
•         n  =  ___________

Write equation:       

Solve for moles:   

Substitute into equation:   

Solve for mole:  n  = 211 mol air