Laboratory #3

Thermodynamics Lab Procedures

1. Brew a large pot of coffee and pour it into 3 equal cups so that each sample has the same volume. Measure the temperature of the coffee in each cup (time = 0 minutes)
2. Distribute the three cups to three different places so that each cup is in a different environment
   1. One cup of coffee back onto the machine so that the coffee stays warm.
   2. Second cup of coffee in a cool place (like a refrigerator)
   3. Third cup of coffee at room temperature
3. After 5 minutes, measure the temperature of each cup of coffee (time = 5 minutes)
4. After another 5 minutes (10 minutes total), measure the temperature of each cup
5. Repeat the measurements every 5 minutes for a total of 60 minutes.

Repeat steps 1-5 for ice water instead of coffee.

Thermodynamics Lab Report

1. Introduction (Why?)
2. Experimental Procedures (How?)
3. Data from thermodynamics experiments (What?)
   Heat transfer in hot material (coffee)
   Heat transfer in cold material (ice water)
4. Results & Discussion (So What?)
   Graphical results: temperature vs. time
   Statistical results: ΔT/Δt
   Discuss how the graphical and statistical results compare
   Discuss the heat transfer mechanisms (conduction, convection, radiation) in your two samples
5. Conclusions
6. References