A) Assume that a substance in a closed container is at thermal equilibrium with about half of its molecules in the gas phase and half of its molecules in the liquid phase. How could you use the Particle Model of Thermal Energy to explain which molecules are moving faster, on average-those in the gas phase, those in the liquid phase, or neither? b) Now assume that liquid water (H20) and gaseous oxygen (O2) are at thermal equilibrium in a closed container at room temperature. How would your explanation for which molecules are moving faster (the H2O molecules in the liquid phase, the O2 molecules in the gas phase, or neither) be the same as your explanation in part a), and how would it differ?