A vessel of 5.0 l capacity contains 1.4 g nitrogen at 1800 K. Assuming that at this temperature, 40% of molecules are dissociated into atoms and the gas is ideal, what is the gas pressure?

Question

Prashant Kotian · Accepted Answer

Correct answer: A. initial moles of n2 = 1.4 / 28 = 0.05 mol. for dissociation n2 ⇌ 2 n, n_total = n × (1 + α) = 0.05 × (1 + 0.40) = 0.07 mol. from ideal gas law: p = nrt/v = 0.07 × 0.0821 × 1800 / 5 = 2.07 atm.

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