IOM 2019, Експеримент — Задача 9. Exercise 2.3: Measuring the temperature dependence of pressure in the flask with sparkling water

The 4th International Olympiad of Metropolises — Carbon Dioxide Solubility in Water

Recommendations Regarding the Experiment

There are two long exercises in the proposed experiment. Exercise 1.5 and exercise 2.1 in total may take more than three hours to complete. Consider this fact when allocating time and responsibilities to the participants during the experiment.

Условие

If you are going to use in this exercise a flask other than the one used in exercise 1.5, then measure its volume. If you are going to use your old flask then just write down its volume again in the answer sheet.

In this exercise use a new bottle of sparkling water that has not yet been opened.

Fill the flask with a mix of plain water and sparkling water using a thermometer plug. Use the method described in exercise 1.5 but with the following slight difference. When removing water from the tube, move the syringe piston to a 20-ml mark to lower the initial pressure in the flask more than you did in exercise 1.5.

Place the flask in a water box at room temperature. Stir and wait several times to achieve equilibrium between gas and water in the flask. Write down the manometer reading corresponding to the equilibrium pressure at room temperature.

Put the flask in the water bath by placing it inside a metal cylinder with holes (this cylinder will prevent water spilling out of the bath while stirring the flask). Carry out an experiment similar to the previous experiment conducted at room temperature. The equilibrium pressure at high temperature cannot be measured accurately because the bath heater is switched on and off periodically. Try to make the best possible estimate of the equilibrium pressure, i.e. the manometer reading corresponding to the equilibrium pressure. After completing the measurement of pressure in the flask placed in the water bath, measure the volume of sparkling water inside the flask.

Решение

---

Оригинал в Архива: phys-task-prak-iom-2019-en.pdf · официални решения: phys-solution-prak-iom-2019-en.pdf