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# Reaction Kinetics Result 1, Recording the time it takes (in seconds) for the temperature to drop in increments of 2C: Temperature( 2C ) 66 64 62 60...

Reaction Kinetics

1. 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.

1. Determine the slope of the line; this is your value for k, the rate constant.
2. 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.
3. 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.
Reacton Kinetcs Result 1, Recording the Tme it takes (in seconds) for the temperature to drop in increments of 2ºC: ±emperature(2ºC ) ±ime(in second) 66 00:52.82 64 00:53.94 62 00:64.48 60 00:67.44 58 00:68.34 56 00:79.83 Analysis 1. 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) = T H2O - T room Record this difference in your data table. 2. 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. 3. Determine the slope of the line; this is your value for k, the rate constant. 4. 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. 5. 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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Temperature vs Time
Time(seconds)
52.82
53.94
64.48
67.44
68.34
79.83 T (0C)
66
64
62
60
58
56 Temperature vs time
66
64 R² = 0.93
f(x) = - 0.36x + 84.07 62 Temperature(0C) 60
58
56
54
50 55 60 65...

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