What is the common form of gas that propane is supplied in for residential use?

Propane is commonly supplied for residential use in liquid form. This is because it can be stored more efficiently under pressure and can be transported in bulk. When the liquid propane is released from the storage tank, it turns into gas vapor for use in appliances.

In its liquid state, propane occupies much less volume than it does when in gas form, making it an economical choice for storage and transportation. The transition from liquid to gas occurs when the propane is released from storage and allowed to expand, which is a fundamental aspect of how propane systems operate in residential settings. This efficient storage and delivery method is essential for providing heating, cooking, and other energy needs in homes.

The other options do not represent how propane is typically handled. As a solid block or an aerosol would not provide the necessary efficiency or practicality for propane use in home heating or cooking applications.