Solid CO2, also known as dry ice, is produced by the pressure snow chamber method. This method involves the conversion of gaseous carbon dioxide (CO2) into a solid state under high pressure.

Explanation:
1. Pressure Snow Chamber Method:
The pressure snow chamber method is a process used to produce solid CO2. In this method, gaseous carbon dioxide is compressed to a high pressure of about 5 to 10 MPa (megapascals). When the gas is compressed to such high pressures, it undergoes a phase change directly from a gas to a solid, bypassing the liquid phase. This solid form of carbon dioxide is known as dry ice.

Advantages of the Pressure Snow Chamber Method:
- The pressure snow chamber method allows for the direct conversion of gaseous carbon dioxide into a solid state without the need for intermediate steps.
- It is a relatively simple and efficient process for producing solid CO2.
- The high-pressure conditions ensure that the solid CO2 is produced in a dense and compact form, making it suitable for various applications.

Applications of Solid CO2:
Solid CO2 (dry ice) has several applications, including:
- Cold storage and transportation: Solid CO2 is commonly used for preserving and transporting perishable goods that require low temperatures.
- Cleaning and blasting: Dry ice blasting is a non-abrasive cleaning method that uses solid CO2 pellets to remove dirt, grime, and contaminants from surfaces.
- Special effects: Solid CO2 is used in the entertainment industry for creating smoke and fog effects in theatrical productions and concerts.
- Food and beverage industry: Solid CO2 is used for chilling and freezing food products, as well as in carbonation processes for beverages.

In conclusion, solid CO2 is produced by the pressure snow chamber method, which involves compressing gaseous carbon dioxide to high pressures to directly convert it into a solid state. This method is efficient and provides solid CO2 in a dense and compact form for various applications.