Substance X is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature. Additic have been determined: melting point - 40. °C boiling point - 10. °C enthalpy of vaporization enthalpy of fusion 5.00 kJ/mol 43.00 kJ/mol 2.90 g/cm (solid) 2.50 g/mL (liquid) density 37. J.K •mol -1 (solid) heat capacity 25. J.K -1 -1 mol (liquid) -1 -1 49. J.Kmol (vapor) You may also assume X behaves as an ideal gas in the vapor phase. Suppose a small sample of X at - 50 °C is put into an evacuated flask and heated at a constant rate until 15.0 kl Graph the temperature of the sample that would be observed during this experiment. You may also assume X behaves as an ideal gas in the vapor phase. Suppose a small sample of X at - 50 °C is put into an evacuated flask and heated at a constant rate until 15.0 kJ/mol of heat has been ad Graph the temperature of the sample that would be observed during this experiment. 50- 40- 10- 20- 10- 0- -10- 20- -30- -40 -50+ 10 heat added (kJ/mol) temperature (*C)

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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.