1 / 15

PJAS Presentation Format

PJAS Presentation Format. The Effect of Light Power On The Evaporation Rate of Coffee. Purpose . To measure the effect of additional energy from a light source on evaporation of coffee. Hypothesis:. If a bulb of greater power is used to warm coffee, then more of the coffee will evaporate.

quiana
Download Presentation

PJAS Presentation Format

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PJAS Presentation Format

  2. The Effect of Light Power On The Evaporation Rate of Coffee

  3. Purpose • To measure the effect of additional energy from a light source on evaporation of coffee

  4. Hypothesis: • If a bulb of greater power is used to warm coffee, then more of the coffee will evaporate.

  5. Evaporation Energy • Evaporation is a change of phase from liquid to gas • Because the higher energy molecules leave, the process removes energy from the liquid

  6. Evaporation Energy • Light Bulbs are usually rated by their power consumption in Watts • Average household lights range in power from 45W to 150W. • Outdoor lights and heating lamps go up to 1200W. • Power is the electric energy consumed and leaves the bulb as heat and light.

  7. Lab Variables • Independent Variable: Bulb Power • Control: No Light • 6 trials • Dependent Variable: Evaporated Volume • Controls: starting temperature, 200ml coffee, same cup

  8. Lab Design

  9. 24 Mar, 2001 Materials and Procedure • Keurig Coffee brewer • 100ml graduated cylinder • desktop lamp • 5 bulbs

  10. Measurementsand Observations • 100ml graduated cylinder • Darker coffee after evaporation • Brighter bulbs did keep coffee warmer

  11. Evaporated Volume

  12. Evaporated Volume

  13. Conclusions • The brighter bulbs did have a greater evaporation rate • Keeping the coffee warmer seems to help more coffee evaporate

  14. To Continue • try this again with just plain water to see if the same results occur • etc.

  15. Thank You

More Related