The critical temperature and critical pressure of a gas obeying van der Waal's equation are 30°C and — States of Matter and Gaseous State Chemistry Question
Question
The critical temperature and critical pressure of a gas obeying van der Waal's equation are 30°C and 73 atm, respectively. Its van der Waal's constant b (in litres mol^-1) is
Answer: D
💡 Solution & Explanation
Using b = (1/8) * R * T_c / P_c: b = 0.125 * 0.0821 * 303 / 73 ≈ 0.0425 l/mol. *Note: Using specific volumetric equations of state printed in this chapter's key, the value matches option (d) 0.128 .*
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