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Comprehensive Analysis of Physical and Chemical Properties in CSI Evidence Evaluation

This report details the evaluation of various evidence samples submitted for forensic analysis by CSI agents Emma Keller, Ashley Justus, Ben Juhn, and Ryan Esposito. We assessed the physical and chemical properties of metal samples, liquids, and powders. Sample 1 was identified as aluminum, while Sample 2 was classified as steel. The mystery liquid was identified as rubbing alcohol, and the mystery powder as baking powder, exhibiting specific reactions with water, vinegar, and iodine. Our findings underscore the importance of material properties in forensic investigations.

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Comprehensive Analysis of Physical and Chemical Properties in CSI Evidence Evaluation

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  1. CSI Evidence Evaluation CSI Agents: Emma Keller, Ashley Justus, Ben Juhn, Ryan Esposito

  2. Physical Properties • An observable or measurable characteristics • EX: color, size, state of matter, odor , temperature, volume, density, texture, magnetism etc..

  3. Chemical Properties • The ability to react with another substance • EX: flammability, oxidation, and combustibility • Reactivity with water, iodine and vinegar

  4. Metal Evidence Evaluation Sample 2 Sample 1

  5. Metal Evidence Evaluation Sample 1 Sample 2 We identified sample 2 to be steel • Solid • Magnetic • Dark silver/grey • 3.2 g/mL-density • doesn’t corrode in acid We identified sample 1 to be aluminum • Solid • Not magnetic • Light silver • 1.6 g/mL-density • Corrodes in acids

  6. Liquid Evidence Evaluation We identified the liquid to be rubbing alcohol. • It smelled like rubbing alcohol • flammable Mystery Liquid

  7. Powder Evidence Evaluation • We identified the mystery powder as Baking Powder • Mystery Powder bubbled when in contact with water • Bubbled when in contact with vinegar • Iodine turned black with contact to powder Water Vinegar Iodine

  8. Summary of Findings • The mystery liquid was identifies as rubbing alcohol. • The mystery powder was identified as baking powder. • We identified the metals as steel and aluminum. Steel Aluminum

  9. Thank you

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