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2.2. If a system is found to obey the phase rule, may we assume that the system is at equilibrium? Explain your answer. 2.3. Classify the following systems as monovariant, divariant, or in variant. Explain your answers. a. Alpha quartz in equilibrium with beta quarz at the transition temperature. b. Monoclinic zirconia at room temperature. c. Ice in equilibrium with its vapor