- You will treat temperature as if it were a concentration (of heat). In order to analyze the data, you will need to know the difference between each temperature value recorded and the original room temperature. For each temperature value recorded, determine the difference between the temperature of the hot water and the room temperature.
T (temperature as concentration) = TH2O - Troom
Record this difference in your data table.Using the Graphical Analysis software, plot three graphs using the temperature versus time data:
- Temperature vs. time
- ln Temperature vs. time
- Temperature-1 vs. time
From the graphs, determine whether the order is zero, one, or two. Be sure to consult the graph rubric for the course in order to determine the specifics for graph construction.
- Determine the slope of the line; this is your value for k, the rate constant.
- Write the rate law for the cooling of water. This should take the form of Rate = k[heat]n with the values for k and n substituted.
- Using what you know about heat and kinetic energy, and what you have learned from Lesson 2 on order of reactions, justify the order you determined for the cooling of water.
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