If there is absolutely no heat present, the temperature would be at absolute zero, which is defined as 0 Kelvin (K) or -273.15 degrees Celsius (°C). Absolute zero is the lowest possible temperature, representing the point at which particles have minimal thermal energy and molecular motion ceases. It is a theoretical limit that has never been achieved in practice. In the context of everyday life, it is impossible to have absolutely no heat, as even the smallest amount of thermal energy is always present.