Hi, For the problem #104 (b) How do you find the value: a and b? Thank you very

Question

Hi,
For the problem #104 (b)
How do you find the value: a and b?
Thank you very much in advance.

CO, CO2, H2, He, NH3, SF6? 104. A 0.245-L flask contains 0.467 mol CO2 at 159 °C. Calculate the pressure: (a) using the ideal gas law (b) using the van der Waals equation (c) Explain the reason for the difference. (d) Identify which correction (that for P or V) is dominant and why. 105. Answer the following questions: (a) If XX behaved as an ideal gas, what would its graph of Z vs. P look like? (b) For most of this chapter, we performed calculations treating gases as ideal. Was thi (c) What is the effect of the volume of gas molecules on Z? Under what conditions is t large? Explain using an appropriate diagram (d) What is the effect of intermolecular attractions on the value of Z? Under what cond When is it large? Explain using an appropriate diagram. (e) In general, under what temperature conditions would you expect Z to have the larg an ideal gas? ma

Explanation / Answer

a & b both are constants for a molecule. These can only be evaluated experimentally. If the values of a & b are not given in the problem then you should remember it while solving those problems. There are no other ways.

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