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Question: 18 a the van der waals equation of state predicts...

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18. a. The van der Waals equation of state predicts the residual volume of a real gas is: im(V-Va)-b-RTI this gas was actually a perfect gas, can you tell me what is the value ofa that makes this true? Hint: it should be a function of b, R, and T, and you do know what the residual volume of a perfect gas is, dont you? b. Take the a and b constants of nitrogen, and calculate how a compares to b RT at 160 °C. Now do the same for helium. Explain why this explains why nitrogen is very perfect gas-like and helium is not. Be very careful about units! For example, a Joule Liter/mol is the same as kPa Litermol (4 pts) 4 pts)
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