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Phase Transformations

Problem 2.203

What fraction of the volume of a vessel must liquid ether occupy at room temperature in order to pass into critical state when critical temperature is reached? Ether has Tcr=467 K,pcr=35.5T_{\mathrm{cr}}=467 \mathrm{~K}, p_{\mathrm{cr}}=35.5 atm, M=74 g/mol.M=74 \mathrm{~g} / \mathrm{mol} .

Reveal Answer
η=8/3Mpcr/ρRTcr=0.25, where ρ is the density of ether at room temperature\eta=8 / 3 M p_{c r} / \rho R T_{c r}=0.25, \text { where } \rho \text { is the density of ether at room temperature}
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