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What separation method would be most effective at separating a solution of substances that can be decomposed by heat? chromatography filtration centrifugation distillation Question 8 0/4 pts Jonas observed and tested four different types of matter in his chemistry lab class. He recorded his observations and results as statements, which are shown below. Which statement includes an indication of a chemical change? - Sample 3 has a low viscosity and evaporates when heated. Sample 4 is an orange metal in dry air and forms a green powdery solid in moist air. Sample 1 is a solid at room temperature and is less dense that water. Sample 2 is a dark reddish brown and has a nonmetallic luster. Dry ice is the solidified form of CO2. When a sample of dry ice is placed on a table it begins to turn into its gas form. Identify what process is taking place, classify it as a chemical or physical change and determine if it is an endothermic or exothermic process. Deposition, Physical, Exothermic Sublimation, Physical, Endothermic Sublimation, Chemical, Exothermic Deposition, Chemical, Endothermic Sublimation, Physical, Exothermic