This warming is in addition to carbon dioxide's better-known effect as a heat-trapping greenhouse gas. For scientists trying to predict global climate change in the coming century, the study underscores the importance of including plants in their climate models.
It is a physical change. All phase changes are physical, not chemical. The chemical composition of water does not change when it changes from a liquid to a gas, or for that ma â¦ tter, to a solid.
Note the extra heat and higher temperature required to. make water boil at 100 pounds pressure than at atmospheric pressure. Note, too, the lesser. amount of heat required to change water to steam at the higher temperature. Figure 4-1. These drawings show how much. heat is required to generate one pound of.