According to the ideal gas law, a 1.074 mol sample of oxygen gas in a 1.746 l container at 267.6 k should exert a pressure of 13.51 atm. what is the percent difference between the pressure calculated using the van der waals' equation and the ideal pressure? for o2 gas, a = 1.360 l2atm/mol2 and b = 3.183×10-2 l/mol.

% differ  1.72%

Explanation:

given data:

P_ideal = 13.51 atm

n = 1.074 mol

V = 1.746 L

T = 267.6 K

According to ideal gas law we have

(P+0.514)(1.711) = 23.59

P_v = 13.276 atm

% differ

             = 1.72%

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.