Ch. 6: Chemical Reactions Study Guide
... A substance that undergoes a change in a chemical reaction is a reactant. In a chemical reaction atoms are rearranged. A change of color is a sign that a chemical reaction is taking place. The changes that are visible during a chemical reaction are signs that the atoms in the reactants have been rea ...
... A substance that undergoes a change in a chemical reaction is a reactant. In a chemical reaction atoms are rearranged. A change of color is a sign that a chemical reaction is taking place. The changes that are visible during a chemical reaction are signs that the atoms in the reactants have been rea ...
THERMODYNAMICS
... In an exothermic reaction, heat is released from the system to the surrounding (- ∆H ) Ex. Combustion of methane; burning a candle In an endothermic reaction, heat is absorbed by the system from the surrounding (+ ∆H ) Ex. Outside surface of glass getting cold (glass ...
... In an exothermic reaction, heat is released from the system to the surrounding (- ∆H ) Ex. Combustion of methane; burning a candle In an endothermic reaction, heat is absorbed by the system from the surrounding (+ ∆H ) Ex. Outside surface of glass getting cold (glass ...
Day 58 - Tahoma
... Reversible process: The system changes so that the system and surroundings can be returned to the original state by exactly reversing the process. This maximizes work done by a system on the surroundings. ...
... Reversible process: The system changes so that the system and surroundings can be returned to the original state by exactly reversing the process. This maximizes work done by a system on the surroundings. ...
Introduction to Heat Transfer
... done on the system (positive value) and the heat absorbed by the system (positive value). Work (w) is developed by a vectorial force acting upon a body (F) that results in a vectorial displacement (x), and is given by: ...
... done on the system (positive value) and the heat absorbed by the system (positive value). Work (w) is developed by a vectorial force acting upon a body (F) that results in a vectorial displacement (x), and is given by: ...
SCIENCE 9
... MOLECULE- smallest indepe3ndent unit of a pure substance, generally a cluster of atoms joined together DIATOMIC MOLECULES- molecules made of two atoms of the same element BINARY COMPOUND- compounds made of two elements ION- a particle or group of particles with a positive or negative charge CONDUCTI ...
... MOLECULE- smallest indepe3ndent unit of a pure substance, generally a cluster of atoms joined together DIATOMIC MOLECULES- molecules made of two atoms of the same element BINARY COMPOUND- compounds made of two elements ION- a particle or group of particles with a positive or negative charge CONDUCTI ...
Chemistry 221 - Oregon State chemistry
... Which unit is used to describe the chemical energy contained within the food you eat? ...
... Which unit is used to describe the chemical energy contained within the food you eat? ...
Chemical Kinetics - Review
... Chemical Kinetics - Review Work should be shown for all calculations. ...
... Chemical Kinetics - Review Work should be shown for all calculations. ...
Atomic Structure
... 1. Consider the human body as a system and apply the first law of thermodynamics to it. We know that over any given period of sufficient length (say one day), there will be a net heat flow from the body (i.e. Q is negative) and the body will do some external work on its surroundings (i.e. W is posit ...
... 1. Consider the human body as a system and apply the first law of thermodynamics to it. We know that over any given period of sufficient length (say one day), there will be a net heat flow from the body (i.e. Q is negative) and the body will do some external work on its surroundings (i.e. W is posit ...
Irreversible Changes
... the time in their everyday life and in the science activities they do in school, but it is not always obvious that a chemical reaction has taken place. Changes that take place in cooking, some heating, mixing some materials, such as vinegar and bicarbonate of soda, and burning are all chemical react ...
... the time in their everyday life and in the science activities they do in school, but it is not always obvious that a chemical reaction has taken place. Changes that take place in cooking, some heating, mixing some materials, such as vinegar and bicarbonate of soda, and burning are all chemical react ...
Writing Chemical Equations
... • Chemical change does not result in destruction or creation of atoms. Thus all atoms in the reactants must also be present in the products. • 2Al(s) + 3Br2(l) → 2AlBr3(s) • In the above equation there are 2 Al atoms and 6 Br atoms, thus matter is conserved. ...
... • Chemical change does not result in destruction or creation of atoms. Thus all atoms in the reactants must also be present in the products. • 2Al(s) + 3Br2(l) → 2AlBr3(s) • In the above equation there are 2 Al atoms and 6 Br atoms, thus matter is conserved. ...
Lecture 4. - ChemWeb (UCC)
... • If heat is evolved, energy is lost by system Exothermic process (q is -ve) •If heat is absorbed, energy is gained by system Endothermic process (q is +ve) ...
... • If heat is evolved, energy is lost by system Exothermic process (q is -ve) •If heat is absorbed, energy is gained by system Endothermic process (q is +ve) ...
Chemical Reactions
... • Product – what is made during the chemical reaction • Law of conservation of mass (or matter)- mass is neither created or destroyed in ordinary chemical or physical changes • Subscript - number (representing atoms) written below and to the right of a chemical symbol ...
... • Product – what is made during the chemical reaction • Law of conservation of mass (or matter)- mass is neither created or destroyed in ordinary chemical or physical changes • Subscript - number (representing atoms) written below and to the right of a chemical symbol ...
Problems with Dalton’s Theory
... of the characteristic features of a chemical change falls short of constituting a proof that atoms have any real existence” Alexander Smith, Professor of Chemistry, University of Chicago, 1910 ...
... of the characteristic features of a chemical change falls short of constituting a proof that atoms have any real existence” Alexander Smith, Professor of Chemistry, University of Chicago, 1910 ...
Review - The University of Texas at Dallas
... Electrolytic Cell Non-spontaneous because E < 0 So external electromotive force (potential) ...
... Electrolytic Cell Non-spontaneous because E < 0 So external electromotive force (potential) ...
Aim # 8: How do we write and balance a chemical equation?
... Note: Oxygen is a diatomic molecule. 3. Balance the equation by supplying coefficients that will make the number of atoms of each element the same on both sides of the arrow. 2Mg + O2 → 2MgO (balanced) Begin by examining the first element on the left side and comparing it to itself on the right side ...
... Note: Oxygen is a diatomic molecule. 3. Balance the equation by supplying coefficients that will make the number of atoms of each element the same on both sides of the arrow. 2Mg + O2 → 2MgO (balanced) Begin by examining the first element on the left side and comparing it to itself on the right side ...
Physical and Chemical Changes
... Changes causing temperature change or causing a change in state (production of a gas – bubbles) indicates a chemical change. Example Calcium + water hydrogen gas + calcium hydroxide ...
... Changes causing temperature change or causing a change in state (production of a gas – bubbles) indicates a chemical change. Example Calcium + water hydrogen gas + calcium hydroxide ...
Chapter 17: Thermodynamics
... heat and other forms of energy. Internal energy (U): the sum of the kinetic and potential energies of the particles making up a system. State Function: a property of a system that depends only on its present state which is determined by variables such as temperature and pressure. ...
... heat and other forms of energy. Internal energy (U): the sum of the kinetic and potential energies of the particles making up a system. State Function: a property of a system that depends only on its present state which is determined by variables such as temperature and pressure. ...
chemical*equations
... “Success'is'not',inal,'failure' is'not'fatal:'it'is'the'courage' to'continue'that'counts.” ''7Winston'Churchill ...
... “Success'is'not',inal,'failure' is'not'fatal:'it'is'the'courage' to'continue'that'counts.” ''7Winston'Churchill ...
Chemical thermodynamics
Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measurements of various thermodynamic properties, but also the application of mathematical methods to the study of chemical questions and the spontaneity of processes.The structure of chemical thermodynamics is based on the first two laws of thermodynamics. Starting from the first and second laws of thermodynamics, four equations called the ""fundamental equations of Gibbs"" can be derived. From these four, a multitude of equations, relating the thermodynamic properties of the thermodynamic system can be derived using relatively simple mathematics. This outlines the mathematical framework of chemical thermodynamics.