Based on the phase diagram for methane, what happens to methane as it is heated from 250 to 180 °C at a pressure of 10 atm? 1 Pressure (atm) 109 102 10 1 10-1 10-2 10-3 10-4 Solid Liquid -200 -100 Supercritical fluid Gas 0 Temperature ("C) It boils at about 180 °C. It sublimes at about 180 °C. Previous Answers It reaches the triple point at about-180 "C Oit melts at about 180 °C. It condenses at about 180 °C. 100

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.