A substance has a melting point of -25.0°C, an enthalpy of fusion of 1200 Jg¹; specific heats for the solid and the liquid are 3.00 and 6.20 Jg¹ C¹, respectively. How much energy is needed to change 150 grams of the substance from a solid at -40.0°C to a liquid at +70.0°C? x 105 joules
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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A substance has a melting point of -25.0°C, an enthalpy of fusion of 1200 Jg¹; specific heats for the solid and the liquid are 3.00 and
6.20 Jg¹ C1, respectively. How much energy is needed to change 150 grams of the substance from a solid at -40.0°C to a liquid at
+70.0°C?
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