HW 15 - Effingham County Schools
... 1. In a chemical change, the matter you start with is called the (reactant/product). 2. In a chemical change, the new matter is called the (reactant/product). 3. The state of matter where the molecules are packed tightly together is called (solid/gas). 4. The state of matter where the molecules have ...
... 1. In a chemical change, the matter you start with is called the (reactant/product). 2. In a chemical change, the new matter is called the (reactant/product). 3. The state of matter where the molecules are packed tightly together is called (solid/gas). 4. The state of matter where the molecules have ...
Document
... Temperature – faster at higher temperatures Particle size – the smaller the particle the faster the chemical reaction Concentration – higher concentrations produce faster reactions Catalysts – increase the rate of a reaction without being chemically changed Enzymes – biological catalysts, usually pr ...
... Temperature – faster at higher temperatures Particle size – the smaller the particle the faster the chemical reaction Concentration – higher concentrations produce faster reactions Catalysts – increase the rate of a reaction without being chemically changed Enzymes – biological catalysts, usually pr ...
THERMOCHEMISTRY
... Calculate the change in internal energy for a process in which the system absorbs 120 J of heat from the surroundings and does 64 J of work on the surroundings. ...
... Calculate the change in internal energy for a process in which the system absorbs 120 J of heat from the surroundings and does 64 J of work on the surroundings. ...
File
... The enthalpy change (ΔH) for chemical reactions is indicated in kJ mol-1 ΔH values are usually expressed under standard conditions, given by ΔHΘ, including standard states Calculation of the heat change when the temperature of a pure substance is changed using q=mcΔT A calorimetry experiment for an ...
... The enthalpy change (ΔH) for chemical reactions is indicated in kJ mol-1 ΔH values are usually expressed under standard conditions, given by ΔHΘ, including standard states Calculation of the heat change when the temperature of a pure substance is changed using q=mcΔT A calorimetry experiment for an ...
study packet for chapter 5
... 31) For which one of the following equations is ΔH°rxn equal to ΔH°f for the product? A) Xe (g) + 2F2 (g) → XeF4 (g) B) CH4 (g) + 2Cl2 (g) → CH2Cl2 (l) + 2HCl (g) C) N2 (g) + O3 (g) → N2O3 (g) D) 2CO (g) + O2 (g) → 2CO2 (g) E) C (diamond) + O2 (g) → CO2 (g) 32) For which one of the following reacti ...
... 31) For which one of the following equations is ΔH°rxn equal to ΔH°f for the product? A) Xe (g) + 2F2 (g) → XeF4 (g) B) CH4 (g) + 2Cl2 (g) → CH2Cl2 (l) + 2HCl (g) C) N2 (g) + O3 (g) → N2O3 (g) D) 2CO (g) + O2 (g) → 2CO2 (g) E) C (diamond) + O2 (g) → CO2 (g) 32) For which one of the following reacti ...
CHEM 1305 - HCC Learning Web
... PART II – Show your work: (8 points each) 21a. Element X has natural isotopes; X-63 (62.940amu) and X-65 (64.928amu). Calculate the atomic mass of element X given the abundance of X-63 is 69.17% b. Which element corresponds to each of the following electron configuration? i. 1S2 2S2 2P5 ii. 1S2 2S2 ...
... PART II – Show your work: (8 points each) 21a. Element X has natural isotopes; X-63 (62.940amu) and X-65 (64.928amu). Calculate the atomic mass of element X given the abundance of X-63 is 69.17% b. Which element corresponds to each of the following electron configuration? i. 1S2 2S2 2P5 ii. 1S2 2S2 ...
Chemistry Cram Sheet
... After studying about recycling, members of John’s biology class investigated the effect of various recycled products on plant growth. John’s lab group compared the effect of different aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesiz ...
... After studying about recycling, members of John’s biology class investigated the effect of various recycled products on plant growth. John’s lab group compared the effect of different aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesiz ...
Chapter 1 Matter and Change
... Mixtures are a physical blend of at least two substances; have variable composition. They can be either: 1) Heterogeneous – the mixture is not uniform in composition • Chocolate chip cookie, gravel, soil. 2) Homogeneous - same composition throughout; called “solutions” • Kool-aid, air, salt water ...
... Mixtures are a physical blend of at least two substances; have variable composition. They can be either: 1) Heterogeneous – the mixture is not uniform in composition • Chocolate chip cookie, gravel, soil. 2) Homogeneous - same composition throughout; called “solutions” • Kool-aid, air, salt water ...
lecture10
... can measure) to determine the relative standard reaction Gibbs energies for any other half reaction and we can write them in tables, such as the one in your book. Finally, we need to somehow relate the electrical world (the voltage on your 1.5 volt battery in your flashlight) to the Gibbs free energ ...
... can measure) to determine the relative standard reaction Gibbs energies for any other half reaction and we can write them in tables, such as the one in your book. Finally, we need to somehow relate the electrical world (the voltage on your 1.5 volt battery in your flashlight) to the Gibbs free energ ...
Chemical Equations
... Indicate the reactants and products in a reaction, using words. Carbonic acid decomposes to produce water and ...
... Indicate the reactants and products in a reaction, using words. Carbonic acid decomposes to produce water and ...
Factors Affecting the Rate of a Chemical Reaction
... According to kinetic theory (do you remember this?) as the temperature increases the particles in a substance move about more quickly. Reaction at 300C ...
... According to kinetic theory (do you remember this?) as the temperature increases the particles in a substance move about more quickly. Reaction at 300C ...
Thermodynamics and Kinetics
... The Second Law of Thermodynamics Natural processes that occur in an isolated system are spontaneous when they lead to an increase in the disorder, or entropy, of the system. Isolated system - System in which neither heat nor work can be transferred between it and its surroundings. This makes it pos ...
... The Second Law of Thermodynamics Natural processes that occur in an isolated system are spontaneous when they lead to an increase in the disorder, or entropy, of the system. Isolated system - System in which neither heat nor work can be transferred between it and its surroundings. This makes it pos ...
Presentation by class of 2013
... constant and it is omitted for calculations of the equilibrium constant in dilute aqueous solutions. If the reaction is not in aqueous solution, then the concentration of water must be included even if it is in the liquid phase; as the concentration of water can vary. However, the concentration ...
... constant and it is omitted for calculations of the equilibrium constant in dilute aqueous solutions. If the reaction is not in aqueous solution, then the concentration of water must be included even if it is in the liquid phase; as the concentration of water can vary. However, the concentration ...
Chemical Equations and Reactions
... that the numbers and types of atoms are the same on both sides of the equation. • This process is called balancing an equation and is carried out by inserting coefficients. ...
... that the numbers and types of atoms are the same on both sides of the equation. • This process is called balancing an equation and is carried out by inserting coefficients. ...
u11_tqs
... 62. A buffer is a solution of what two combinations? a weak acid and one of its salts, or a weak base and one of its salts 63. What is meant by a solution’s buffer capacity? the amount of acid or base that can be added to it before a significant pH change occurs 64. List two of the buffer systems th ...
... 62. A buffer is a solution of what two combinations? a weak acid and one of its salts, or a weak base and one of its salts 63. What is meant by a solution’s buffer capacity? the amount of acid or base that can be added to it before a significant pH change occurs 64. List two of the buffer systems th ...
Part a
... chemical substances Electrical energy—results from movement of charged particles Mechanical energy—directly involved in moving matter Radiant or electromagnetic energy—exhibits wavelike properties (i.e., visible light, ultraviolet light, and X-rays) ...
... chemical substances Electrical energy—results from movement of charged particles Mechanical energy—directly involved in moving matter Radiant or electromagnetic energy—exhibits wavelike properties (i.e., visible light, ultraviolet light, and X-rays) ...
Chapter 11 statistical mechanics
... so we can evaluate average observables < A >= Tr{ Âρ̂eq } = A that give us fundamental relations or equations of state. Just as thermodynamics has its potentials U, A, H, G etc., so statistical mechanics has its ensembles, which are useful depending on what macroscopic variables are specified. We f ...
... so we can evaluate average observables < A >= Tr{ Âρ̂eq } = A that give us fundamental relations or equations of state. Just as thermodynamics has its potentials U, A, H, G etc., so statistical mechanics has its ensembles, which are useful depending on what macroscopic variables are specified. We f ...
PV Diagrams
... This is actually reasonable. The area on the top of the piston doesn’t change, so the force exerted on it by the atmosphere is constant. When the piston rises to some position, the force pushing down is still the same, so the force inside pushing up must be the same as well. Since this force comes f ...
... This is actually reasonable. The area on the top of the piston doesn’t change, so the force exerted on it by the atmosphere is constant. When the piston rises to some position, the force pushing down is still the same, so the force inside pushing up must be the same as well. Since this force comes f ...
Slide 1
... repeating cycle; the change in internal energy over a cycle is zero, as the system returns to its initial state. The high temperature reservoir transfers an amount of heat QH to the engine, where part of it is transformed into work W and the rest, QL, is exhausted to the lower temperature reservoir. ...
... repeating cycle; the change in internal energy over a cycle is zero, as the system returns to its initial state. The high temperature reservoir transfers an amount of heat QH to the engine, where part of it is transformed into work W and the rest, QL, is exhausted to the lower temperature reservoir. ...
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.