Carotenoids are the compounds responsible for yellow, orange and red colours in many fruit, vegetable and algal sources. Within each source, carotenoids vary in concentration, proportions and chemical structure, all of which influence how it can be used in a food product.
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.
The combined motion energy of all of the gas molecules in a container is called the average kinetic energy. This average kinetic energy (energy of motion) changes in response to temperature. When the temperature increases, the average kinetic energy of the gas molecules also increases. The molecules move faster and have more frequent and harder elastic collisions with the inside of the container. So, when your balloon was in the store, at room temperature, it was plump and full.