Glass is a solid material that has a wide range of thermal properties, which can vary depending on the specific type of glass and its composition. Some of the key thermal properties of glass include:

1. Thermal conductivity: Glass is generally a poor conductor of heat, which means that it is a good insulator. The thermal conductivity of glass can vary depending on the type of glass, but it is typically between 0.8 and 1.3 W/m*K.
2. Thermal expansion: Like most materials, glass expands when it is heated and contracts when it is cooled. The coefficient of thermal expansion of glass can vary depending on the type of glass, but it is generally in the range of 8-10 x 10^-6 /K.
3. Specific heat capacity: The specific heat capacity of glass is the amount of heat required to raise the temperature of a given mass of glass by one degree Celsius. This value can vary depending on the type of glass, but it is generally in the range of 700-800 J/kg*K.
4. Melting point: Glass is a non-crystalline solid that does not have a well-defined melting point like crystalline solids. Instead, glass softens and gradually becomes more fluid as it is heated. The temperature at which this occurs can vary depending on the type of glass, but it is generally in the range of 500-1500°C.

Overall, the thermal properties of glass make it a versatile material for a wide range of applications, including as a building material, for laboratory equipment, and in the manufacturing of electronic devices.