CHM 10454 kinetic energv of the The amount of heat contained in the aluminum cyl

Question

CHM 10454 kinetic energv of the The amount of heat contained in the aluminum cylinder, q, is related to the afuminum atoms and is proportional to temperature only Data Analysis 1. 1s the heat energy (e) contained in the aluminum cylinder the same for all experiments performed? Justify your answer 2 Sketch a drawing of the heating curve for one of your experiments below. Show where on the graph you found Te and Ta s the temperature change, AT, for experiments R1, R2, and R3. Are they the same or very same value? Should they be the same for these three experiments when the 3. Discuss the mass close to the same of the water was the same? Justify your answer 4. To determine the relationship between mass and temperature, you will need to graph the change in temperature (AT) and the masses recorded in Data Table 1. Make sure to plot the independent variable on the x-axis and the dependent variable on a. the y-axis. Use Excel to graph the data, and be sure to include the graph in your lab report b. Look at the graph plotted from your data. Is the graph linear? If this graph is linear, thern mass is directly proportional to the change in temperature, or m ar. This would mean that there is some constant k whereby the following equation is true: m = kar. Based on your graph, discuss whether this equation represents your data. 5, For the same experiments, graph 1/mass and . ariable on the x-axis and the dependent variable on the y-axis. Use Excel to graph the data, and be sure to include the graph in your lab report. Look at the graph plotted from your data. Is this graph linear? If this graph is linear, then mass is directly proportional to the change in temperature, or . This would mean that there is some constant k whereby the following equation is true: 1=kar. Based on your graph, discuss whether this equation represents your data. b. m 772 sure to attach any data tables, graphs, and analysis of your data in your lab report. 85

Explanation / Answer

#1: No, Q is not the same in all experiments. Q is depending of the temperature of aluminium atoms, so, if the temperature is not exactly the same, the q will not be the same.

#3: Two of the temperature variation (1 and 2) are very close to each other, but the third one is not, this can be explained with a change of experiment conditions or errors during the temperature measurement.

If the mass of water is the same, the temperature variation should be the same too. In this case is not exactly the same because the calorimeter is not completely isolated and the measurement is not the exactly the same every time, this is why we called "experimental".

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