Table 1: Temperature and volume data
Trial Temperature (Celsius) Volume (mL)
Starting Volume Room Temperature =
Hot Water Trial 1 106 5.2ml
Hot Water Trial 2 107 5.4ml
Cold Water Trial 1 lo 4.3ml
Cold Water Trial 2 lo 4.3ml
PLOT AREA
(Insert a graph that you either drew here in Word or built from Excel using the data collected in this section)
Note: On the graph, you are graphing volume on the y axis, temperature on the x axis. Use a line graph - not a bar graph. You should have a linear graph, and if all goes right, you can extrapolate back so that the x axis is crossed at 0 K or -273 C.
Questions:
1. What happened to the volume of gas when the syringe was submerged in each water bath? Using the concepts discussed above, describe why this occurs, keeping in mind the definition of temperature.
The volume of gas increased when submerged in hot water. As the water temperature increased the gas within the syringe began to rise causing an increase in pressure. When the syringe was submerged in cold water the gases started to fall in pressure.
(Tip: Compare the volume of gas in hot water versus cold water and record your observation. Explain what you are seeing and why this is so.)
2. How do you know that pressure is held constant in your experiment?
3. Using a ruler, draw a straight line of best fit through your data points, extrapolating the line until it intersects the (negative) x-axis. Why can you assume a straight line, i.e., a linear relationship?
4. At what temperature does your line intersect the x-axis? What volume corresponds to this temperature?
1 answer