150 135 120 D E 105 90 75 60 B C 45 30A 15 Heat (kJ) Created by E Lee for Virtual Viginia (2021) Using this heating curve, complete the following statements: 1) The substance's melting or freezing point can be found between points (Select] and [Select] (Select the points alphabetically; for example, "X and Y" not "Y and X") 2) Between points (Select] and d [Select] , the substance is in the liquid phase. (Select the points alphabetically; for example, "X and Y" not "Y and X") 3) At 50°C, the substance is a (Select ] Temp. (°C)
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.
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