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An experiment was performed to investigate the effect of temperature on the solubility of carbon dioxide in water - Junior Cycle Science - Question a - 2012
Question a
An experiment was performed to investigate the effect of temperature on the solubility of carbon dioxide in water. The data obtained from this experiment is given in... show full transcript
Worked Solution & Example Answer:An experiment was performed to investigate the effect of temperature on the solubility of carbon dioxide in water - Junior Cycle Science - Question a - 2012
Step 1
Draw a graph of solubility against temperature
Answer
To draw the graph:
- Plot the data points from the table on the graph, with the x-axis representing temperature (°C) and the y-axis representing solubility of CO₂ (grams per kg of water).
- The points to plot are:
- (0, 3.4)
- (10, 2.5)
- (20, 1.7)
- (30, 1.4)
- (40, 1.0)
- (50, 0.8)
- (60, 0.6)
- Connect the points with a smooth curve, illustrating the trend of decreasing solubility with increasing temperature.
Step 2
Suggest a reason why solubility of a gas decreases as temperature increases
Answer
The solubility of a gas decreases as temperature increases due to the increased kinetic energy of gas molecules. As temperature rises, the motion of gas molecules intensifies, allowing them to escape from the solvent more easily and resulting in lower solubility. Additionally, gases tend to occupy a greater volume at higher temperatures, further decreasing their ability to dissolve in water.
Step 3
From the graph estimate the temperature at which the solubility of CO₂ is 2 g per kg of water
Answer
From the graph, the temperature at which the solubility of CO₂ is approximately 2 g per kg of water is around 16 °C. This can be estimated by locating the point on the graph where the solubility reaches 2 g/kg and determining the corresponding temperature on the x-axis.