Consider the heating curve for 1.00 mole of an unknown substance as it is heated from a solid to a gas provided in the questions below. For which line on the heating curve would both solid and liquid be present? a b c d e The heat added for which line would represent the enthalpy of vaporization for this substance? a b c d e Which combination of lines would be equivalent to the enthalpy of sublimation for this substance? A+B B+C B+D C+D D+E
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.
- a
- b
- c
- d
- e
The heat added for which line would represent the enthalpy of vaporization for this substance?
- a
- b
- c
- d
- e
Which combination of lines would be equivalent to the enthalpy of sublimation for this substance?
- A+B
- B+C
- B+D
- C+D
- D+E
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