Final answer:
A permit is required for storing a flammable gas in excess of a certain amount because it poses a higher risk of fire and explosion. Flammable gases have low ignition temperatures and can rapidly release a large amount of energy when ignited. Regulations and permits are in place to control the storage and handling of flammable gases.
Step-by-step explanation:
A permit is required for storing a flammable gas in excess of a certain amount because it poses a higher risk of fire and explosion. Flammable gases have specific properties that make them more dangerous to store in large quantities. These gases have low ignition temperatures, meaning they can easily catch fire, and they can rapidly release a large amount of energy when ignited.
For example, if a flammable gas is stored in a container and the temperature increases, the pressure inside the container will also increase. If the pressure exceeds the container's maximum safety limit, it can lead to an explosion.
To ensure safety, regulations and permits are in place to control the storage and handling of flammable gases, including setting limits on the maximum amount of gas that can be stored without a permit.