Interpretation: The main difference between physical and chemical change should be explained.
Concept Introduction: A change that affects the chemical composition of a substance is said to be a chemical change whereas a change that affects the form of a substance but not its chemical composition is said to be a physical change.

Explanation of Solution
A change that affects the chemical composition of a substance is said to be a chemical change. This change results in the formation of matter that possesses different composition than the original matter. In this change, the
Chapter 2 Solutions
EP CHEMISTRY-ETEXT ACCESS
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- What I Have Learned Directions: Given the following reaction and the stress applied in each reaction, answer the question below. A. H2(g) + Cl2(g) 2 HCl(g) Stress applied: Decreasing the pressure 1. What is the Keq expression? 2. What will be the effect in the number of moles of HCl(g)? 3. What will be the Equilibrium Shift or the reaction? B. Fe3O4(s) + 4 H2(g) + heat 53 Fe(s) + 4 H₂O(g) Stress applied: Increasing the temperature 1. What is the Keq expression?. 2. What will be the effect in the volume of water vapor collected? 3. What will be the Equilibrium Shift or the reaction? C. 4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g) + heat Stress applied: Increasing the volume of the container 1. What is the Keq expression?. 2. What will be the effect in the amount of H₂O? 3. What will be the Equilibrium Shift or the reaction?arrow_forwardConsider the solubility products (Ksp values) for the following compounds:SrSO4 (Ksp = 7.6 x 10−7), BaSO4 (Ksp = 1.5 x 10−9), SrCO3 (Ksp = 7.0 x 10−10), BaCO3 (Ksp = 1.6 x 10−9)Which anion is the harder base, CO32− or SO42−? Justify your answer.arrow_forwardQ1: a) Arrange the compounds in order of decreasing pKa, highest first. ОН ΟΗ ῸΗ дон ОН ОН CI Brarrow_forward
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