(1) vanderwall equation is -
"(P+\\frac{an^2}{V^2})(V-nb)=nRT" \\
"(P+\\frac{121.57}{0.6334})(0.7959-0.3656)=9.352\\times 0.08205\\times304.3"
"(P+191.93)(0.4303)=233.5\\\\P=350.715\\ atm" (2)
"P_{ideal}=20.62\\ atm\\\\using\\ vanderwall\\ equation\\\\(P+\\frac{an^2}{V^2})(V-nb)=nRT\\\\(P+\\frac{3.406}{1.1151})(1.056-0.04155)=0.9738\\times0.08205\\times272.5"
"(P+3.0544)(1.01445)=21.773\\\\P=18.4085\\ atm" Difference between actual pressue and ideal pressure =
"20.62-18.4085=2.2115\\ atm" percentage difference =
"\\frac{(2.2115\\times100)}{20.62}=10.725\\ \\%"
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