Answer:
I think the color of the paper is Black.Am I right?
Answer:
The difference between the energy of the reactants and the energy of the products is called the enthalpy change (∆H) of the reaction. For an exothermic reaction, the enthalpy change is always negative. In an endothermic reaction, the products are at a higher energy than the reactants.
Explanation:
A phase change from Gas to liquid means that it was cold outside and so the molecules went from being very free moving to forming bonds with one another due to the cold.
A. hex- Normally with 6, the prefix is hex-. For example a polygon having 6 sides is known as hexagon.
According to my brain the answer is natural gas
