The solubility of gases decreases as the temperature of the water increases as shown by the solubility curves on the right.

Increasing the temperature causes the kinetic energy of the molecule to increase. The higher kinetic energy causes the molecules to move about faster breaking intermolecular bonds and escaping from solution.

As the temperature rises the amount of gas that escapes the solution increases.

1) Which one of the following options best explains why a warm can of soft drink has more fizz when opened than a cold can. Heat makes the water molecules move faster generating steam. Warm water can hold less gas. Warm water can dissolve more gas.

2) What will happen to the air at the surface of the liquid inside a can of carbonated soft drink as it is heated? The pressure will decrease. The air will become thinner. The concentration of carbon dioxide will increase.

3) The Green House Effect is due to a build up of carbon dioxide in the atmosphere. Oceans dissolve a great deal of carbon dioxide. Scientists fear that carbon dioxde will be pumped out of the oceans and back into the atmosphere as the Earth warms up. Why?

Warm air causes cyclones which reduce the solubility of gas. Warm water can not dissolve as much gas as cold water. Warm oceans tend to dissolve more oxygen which leaves less room for carbon dioxide.