5. a.) what is the ratio of liquid to solid at 1500˚c? show your work with clear labels and references to the diagram so that the source of your numbers is obvious.

b.) at what temperature will φ next change? what occurs at this temperature? what is the name of the curve intersected? describe the composition of each phase present. derive the variance. what does f imply?

c.) does cooling from this point represent a continuous or discontinuous reaction? write the reaction.

Which of the following characteristics are true of enzymes? check all that apply. a.)the structure of an enzyme can change if conditions change. b.)a single enzyme can normally catalyze a wide variety of reactions under many conditions. c.)enzymes are found only in nonliving systems. d.)enzymes allow living things to regulate body conditions through feedback mechanisms. e.)enzymes bind to specific substrates in specific ways. f.)enzymes increase the rate of reaction. g.)when shown in energy-reaction diagrams, enzymes represent the higher activation energy.