Rotational energy is the energy that an object possesses due to its spinning or rotating motion. Think of a spinning top, it has energy because it’s spinning!
When an object has both rotational energy and heat energy, we call this “enthalpy”. Enthalpy is the combination of heat energy and rotational energy in a system.
So, imagine you have a toy car that you wind up with a spring. As the car moves forward, the spring unwinds and the wheels of the car spin faster and faster. The car now has both rotational energy and heat energy due to friction between the wheels and the floor.
This car has an enthalpy, which is the combination of the rotational energy and heat energy. It's like when you mix different flavored juice to make a new, special drink!
Enthalpy is a way to measure energy in a system, and it’s really important in science and engineering when we want to study how things interact with each other.