FINAL EXAM REVIEW
... 7) Draw a graph of temperature vs. energy showing the phase changes. Be sure to label all the phases, phase changes, melting points, boiling points etc. 8) For each of the following write whether it is a mechanical mixture (M), an element (E) or a compound (C). a) carbon b) sugar c) milk d) muddy wa ...
... 7) Draw a graph of temperature vs. energy showing the phase changes. Be sure to label all the phases, phase changes, melting points, boiling points etc. 8) For each of the following write whether it is a mechanical mixture (M), an element (E) or a compound (C). a) carbon b) sugar c) milk d) muddy wa ...
Lecture 3 Chemistry
... Lattice –Repeat Units Crystalline: regular Geometric shape Amorphous- shapeless chocolate glass soot Physical Chemical Changes: Physical – H20 3 phases(solid, liquid, and gas) Chemical- composition Altered CH4 CO2 + H20 Structure: ...
... Lattice –Repeat Units Crystalline: regular Geometric shape Amorphous- shapeless chocolate glass soot Physical Chemical Changes: Physical – H20 3 phases(solid, liquid, and gas) Chemical- composition Altered CH4 CO2 + H20 Structure: ...
Thermochemistry
... Thermochemistry is the study of the energy and heat associated with chemical reactions and/or physical transformations. Calorimetry is the science of measuring the heat of chemical reactions or physical changes. ...
... Thermochemistry is the study of the energy and heat associated with chemical reactions and/or physical transformations. Calorimetry is the science of measuring the heat of chemical reactions or physical changes. ...
02-Atoms-Molecules
... Every atom has the same basic structure Core nucleus of protons and neutrons Orbiting cloud of electrons ...
... Every atom has the same basic structure Core nucleus of protons and neutrons Orbiting cloud of electrons ...
Document
... An electrolytic cell differs from a chemical (or voltaic) cell in that the electrolytic cell (A) produces an electric current (B) uses an applied electric current (C) involves oxidation and reduction reactions (D) occurs spontaneously ...
... An electrolytic cell differs from a chemical (or voltaic) cell in that the electrolytic cell (A) produces an electric current (B) uses an applied electric current (C) involves oxidation and reduction reactions (D) occurs spontaneously ...
Chapter 2 - Chemical Context of Life
... A compound is a substance consisting of two or more elements in a fixed ratio. ...
... A compound is a substance consisting of two or more elements in a fixed ratio. ...
Smith Reaction- HW PSI Chemistry
... C) The starting materials are named reactants. D) The bonds of the reactants are broken and new bonds of the products are formed. E) In a word equation representing a chemical reaction, the reactants are written on the left and the products on the right. 14) Chemical equations _____. A) describe che ...
... C) The starting materials are named reactants. D) The bonds of the reactants are broken and new bonds of the products are formed. E) In a word equation representing a chemical reaction, the reactants are written on the left and the products on the right. 14) Chemical equations _____. A) describe che ...
ch8 - Otterville R-VI School District
... Classify each of the following reactions one of the five basic types: Na2O + H2O NaOH Zn (s) + 2HCl(aq) ZnCl2(aq) + H2(g) Ca(s) + 2H2O(l) Ca(OH)2(aq) + H2(g) ...
... Classify each of the following reactions one of the five basic types: Na2O + H2O NaOH Zn (s) + 2HCl(aq) ZnCl2(aq) + H2(g) Ca(s) + 2H2O(l) Ca(OH)2(aq) + H2(g) ...
Final Review
... terms of attraction between particles. 6. Using the values given in #5, calculate the amount of energy needed to melt 7.95x10 5 g of ice. Is this an exothermic or endothermic reaction? 7. Explain why the water molecule is polar. In your explanation, include why the water molecule is bent? 8. From yo ...
... terms of attraction between particles. 6. Using the values given in #5, calculate the amount of energy needed to melt 7.95x10 5 g of ice. Is this an exothermic or endothermic reaction? 7. Explain why the water molecule is polar. In your explanation, include why the water molecule is bent? 8. From yo ...
CHM1 Review for Exam 9 Topics 1. Reaction Types a. Combustion
... N2 (g) + 3 H2 (g) 2 NH3 (g) + heat When equilibrium is reached in this system, the rate of the forward reaction is (1) less than the rate of the reverse reaction (2) greater than the rate of the reverse reaction (3) equal to the rate of the reverse reaction (4) unrelated to the rate of the revers ...
... N2 (g) + 3 H2 (g) 2 NH3 (g) + heat When equilibrium is reached in this system, the rate of the forward reaction is (1) less than the rate of the reverse reaction (2) greater than the rate of the reverse reaction (3) equal to the rate of the reverse reaction (4) unrelated to the rate of the revers ...
Physical Science Chapter 7 Chemical Reactions Section 7.1
... 1. Which of these statements best describes a double-replacement reaction? a. Two different compounds exchange positive ions and form two new compounds. b. An element takes the place of another element in a compound. c. One compound breaks down into two or more simpler substances. d. Two or more sub ...
... 1. Which of these statements best describes a double-replacement reaction? a. Two different compounds exchange positive ions and form two new compounds. b. An element takes the place of another element in a compound. c. One compound breaks down into two or more simpler substances. d. Two or more sub ...
Document
... Matter with a uniform and definite composition (also called a pure substance). All samples of a substance have identical physical properties. ...
... Matter with a uniform and definite composition (also called a pure substance). All samples of a substance have identical physical properties. ...
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.Reactions may proceed in the forward or reverse direction until they go to completion or reach equilibrium. Reactions that proceed in the forward direction to approach equilibrium are often described as spontaneous, requiring no input of free energy to go forward. Non-spontaneous reactions require input of free energy to go forward (examples include charging a battery by applying an external electrical power source, or photosynthesis driven by absorption of electromagnetic radiation in the form of sunlight).Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperatures and concentrations present within a cell.The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.