Question

1) A 10.60 mol sample of argon gas is maintained in a 0.8466 L container at 298.6 K. What is the pressure in atm calculated using the van der Waals' equation for Ar gas under these conditions? For Ar, a = 1.345 L²atm/mol² and b = 3.219×10^-2 L/mol.

A: ______ atm

2) According to the ideal gas law, a 1.007 mol sample of argon gas in a 1.337 L container at 272.3 K should exert a pressure of 16.83 atm. By what percent does the pressure calculated using the van der Waals' equation differ from the ideal pressure? For Ar gas, a = 1.345 L²atm/mol² and b = 3.219×10^-2L/mol.

Hint: % difference = 100×(P _ideal - P_{van der Waals}) / P _ideal

A: ________% ​