Pre-Laboratory Assignment 1. Sam performed a reaction in lab where he mixed a dilute solution of hydrochloric acid into a dilute solution of sodium hydroxide. The temperature of the mixed solution rose immediately from 20.0°C to 30.0 °C. Was the reaction Sam performed in the lab exothermic or endothermic? What evidence (obscervation) for this reaction supports your inference? 2. Define Hess's Law.

Q: Question 14 Which of the following statements about energy is false? O Energy cannot be converted…

A: Energy cannot be converted from one form into another

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A:

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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.