What type of heat increases the temperature of a substance without changing its state?

Sensible heat is the type of heat that increases the temperature of a substance without changing its state. When heat is added to a substance, and it leads to a measurable rise in temperature, this energy is classified as sensible heat. This phenomenon can be observed when heating water on a stove; as the temperature of the water rises, it remains in the same state (liquid) until it reaches its boiling point.

Latent heat, on the other hand, is involved in phase changes, such as melting or boiling. It refers to the heat absorbed or released when a substance changes its state but does not lead to a change in temperature.

Convection heat deals with the transfer of heat through fluids (liquids and gases) caused by the movement of the fluid itself. While convection can be a method of transferring sensible heat, it is not a type of heat itself.

Radiant heat refers to the transmission of energy through electromagnetic waves, allowing heat to transfer through a vacuum or transparent medium. This is not directly related to a change in temperature in the way that sensible heat is.

Therefore, the distinction of sensible heat as the heat that raises temperature without a state change makes it the correct answer in this context.