4B50.u1 - Oceanic CO2 Storage and Global Warming Effects
To demonstrate how quickly an environment can heat up due to the amount of CO2 that is present and how the stored CO2 that is in the ocean is released in the atmosphere when the environment reaches a high temperature.
Two sets of beakers are needed for this demonstration. One set are 1000-mL tall beakers that are kept with the supplies for this demonstration. They each have a cork assembly made to fit each individual beaker, so make sure you use the correct cork for the correct beaker. The second set of beakers are the 1000-mL short beakers that need to be grabbed from the glassware cabinet.
First connect a bench clamp to an L-shaped bench rod. Two rod clamps are used to hold two 3-fingered clamps vertically. Two 250-mL graduated cylinders are inverted into the 1000-mL short beakers and filled with dyed water. It is important to have as little an air bubble in the graduated cylinders as possible. The bases of the graduated cylinders are held in place by the 3-fingered clamps, but wait until the end to clamp them into the assembly.
A second set of beakers are used to house our "oceans". These are the 1000-mL tall beakers with fitted corks. Each cork has a port hole for the thermocouple probe, as well as a feeder hose that will collect all of the CO2 gas that is released during our experiment. To prepare the "oceans" complete the following stes:
1. Fill each tall beaker with 200-mL of tap water.2. Fill each tall beaker with 200-mL of carbonated water.3. Seal one of the tall beakers with the provided cork assembly.4. Feed the sealed beaker's feeder tube into one of the graduated cylinders so that the gas that is released will be collected by the graduated cylinder.5. Add approximately 200-mL of ice into the remaining beaker and seal that cork assembly. COMPLETE THIS STEP JUST BEFORE OPERATION.6. Feed the feeder tube for the beaker with the ice in it into the other graduated cylinder.7. Clamp the bases of the graduated cylinders into the 3-fingered clamps.8. Place both beakers onto the pre-heated hot plate and observe.
A laptop is used to record temperature data of the two "environments" we are creating. The software used is TracerDAQ, with the thermocouple probes plugged into channels 0 and 1. Also, a camera is used to view the inverted graduated cylinders so the students can observe the amount of CO2 that is collected by each environment.
**NEED AT LEAST A 24 HOUR NOTICE TO USE THIS DEMONSTRATION**
This demonstration compares an "ocean" with water and carbonated water vs. an "ocean" with water, carbonated water, and ice present. A laptop is used to collect the temperature data of these two environments as they are exposed to a increase in temperature over time. Also, an inverted graduated cylinder filled with liquid is used to gauge the amount of CO2 that is released in each of these environments as time passes and the heat rises.
With the apparatus set up as described in the Assembly instructions, the only steps that will need to be completed by the lecturer are as follows:
1. Add approximately 200-mL of ice into the unsealed beaker and seal that cork assembly. COMPLETE THIS STEP JUST BEFORE OPERATION.2. Feed the feeder tube for the beaker with the ice in it into the other graduated cylinder.3. Clamp the bases of the graduated cylinders into the 3-fingered clamps.4. Place both beakers onto the pre-heated hot plate and observe the results.
This demo will need to continue to run for a period of time in order to see the full effect. Depending on the amount of ice you put into the second "ocean" will determine how long the demo should be ran for. At least half an hour is needed.