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General Chemistry: Principles and Modern Applications

Sketch a plausible phase diagram for hydrazine $\left(\mathrm{N}_{2} \mathrm{H}_{4}\right)$ from the following data: triple point $\left(2.0^{\circ} \mathrm{C}\right.$ and $3.4 \mathrm{mmHg}$ ), the normal melting point $\left(2^{\circ} \mathrm{C}\right),$ the normal boiling point $\left(113.5^{\circ} \mathrm{C}\right),$ and the critical point $\left(380^{\circ} \mathrm{C} \text { and } 145 \mathrm{atm}\right) .$ The density of the liquid is less than that of the solid. Label significant data points on this diagram. Are there any features of the diagram that remain uncertain? Explain.