What happens to propane inside a container when the outside temperature increases?

When the outside temperature increases, propane inside a container expands. This is due to the physical properties of gases and liquids, which tend to expand when heated. As the temperature rises, the kinetic energy of the propane molecules increases, causing them to move more vigorously. This increased movement results in the molecules needing more space, leading to an expansion of the propane within the container.

Conversely, if the temperature were to decrease, the propane would contract as the kinetic energy of the molecules decreases, causing them to take up less space. The other options do not accurately reflect the behavior of propane in response to an increase in temperature. Combustion requires a fuel source and an igniting agent, while freezing suggests a drop in temperature, neither of which apply in this scenario. Therefore, the correct answer reflects a logical understanding of gas behavior in changing temperatures.