![Notes: Kinetics and Equilibrium](http://s1.studyres.com/store/data/001265836_1-c07f71527aff04ffc4b63629db95c952-300x300.png)
Physical and Chemical change: Introduction
... During a chemical change, the particles themselves are changed in some way. In the example of copper (II) chloride that was used earlier, the CuCl2 molecules were split up into their component atoms. The number of particles will change because each CuCl2 molecule breaks down into one copper atom (Cu ...
... During a chemical change, the particles themselves are changed in some way. In the example of copper (II) chloride that was used earlier, the CuCl2 molecules were split up into their component atoms. The number of particles will change because each CuCl2 molecule breaks down into one copper atom (Cu ...
2005 - NESACS
... I. The activation energy for the forward reaction is about 80 kJ/mol. II. The overall reaction is exothermic. III. The species at the top of the barrier is the activated complex. (A) (B) (C) (D) ...
... I. The activation energy for the forward reaction is about 80 kJ/mol. II. The overall reaction is exothermic. III. The species at the top of the barrier is the activated complex. (A) (B) (C) (D) ...
CST REVIEW Percent Error 1. 2. What is the formula for density?
... 140. There are 1.6 moles of magnesium chloride in 0.37 kg of solution. What is the % composition? Acids and Bases 141. Describe how acids and bases each taste. 142. What color do acids and bases each turn litmus paper? 143. What is produced when an acid reacts with a base? 144. What is produced when ...
... 140. There are 1.6 moles of magnesium chloride in 0.37 kg of solution. What is the % composition? Acids and Bases 141. Describe how acids and bases each taste. 142. What color do acids and bases each turn litmus paper? 143. What is produced when an acid reacts with a base? 144. What is produced when ...
Matter_and_Change2
... • Solid: definite shape and volume • Liquid: Takes on shape of container, definite volume • Gas: Fills any space; compressible ...
... • Solid: definite shape and volume • Liquid: Takes on shape of container, definite volume • Gas: Fills any space; compressible ...
Atomic Structure - s3.amazonaws.com
... Early Models of the Atom Dalton’s Atomic Theory (Between 1766-1844) Atoms of different elements can physically mix together or can chemically combine in simple whole-number ratios to form compounds. Chemical reactions when atoms are separated, joined, or rearranged. Atoms of one element are neve ...
... Early Models of the Atom Dalton’s Atomic Theory (Between 1766-1844) Atoms of different elements can physically mix together or can chemically combine in simple whole-number ratios to form compounds. Chemical reactions when atoms are separated, joined, or rearranged. Atoms of one element are neve ...
Learning Activities
... Standard I: Understand the processes of scientific investigations and use inquiry and scientific ways of observing, experimenting, predicting, and validating to think critically. 9-12 Benchmark I: Use accepted scientific methods to collect, analyze, and interpret data and observations and to design ...
... Standard I: Understand the processes of scientific investigations and use inquiry and scientific ways of observing, experimenting, predicting, and validating to think critically. 9-12 Benchmark I: Use accepted scientific methods to collect, analyze, and interpret data and observations and to design ...
Ch. 9
... • The more electronegative element is written last and w/ ide • Use prefixes to tell you the subscript in each • Mono is not written w/ the 1st word of a compound’s name (Ex: CO2) • Prefixes are sometimes shortened to make a name easier to say (Ex: CO is carbon monoxide not mono oxide) • Sometimes u ...
... • The more electronegative element is written last and w/ ide • Use prefixes to tell you the subscript in each • Mono is not written w/ the 1st word of a compound’s name (Ex: CO2) • Prefixes are sometimes shortened to make a name easier to say (Ex: CO is carbon monoxide not mono oxide) • Sometimes u ...
in a Chemical Reactor - Max-Planck
... and build the appropriate reactor around it – and often with very good reason, as more problems could be created than solved if the reaction were to be changed. However, this requires a very knowledgeable background in chemistry, which is what helped us when we were mulling over the process of cyclo ...
... and build the appropriate reactor around it – and often with very good reason, as more problems could be created than solved if the reaction were to be changed. However, this requires a very knowledgeable background in chemistry, which is what helped us when we were mulling over the process of cyclo ...
Chemistry I Syllabus 2011-2012
... Classroom Procedures: 1. Enter the classroom quietly, sit in your assigned seat and begin work. 2. Turn in assignments to the appropriate box assigned to your class and in a timely manner. 3. Sharpen pencils only during student work time and only until you hear the sharpener change pitch. 4. No hall ...
... Classroom Procedures: 1. Enter the classroom quietly, sit in your assigned seat and begin work. 2. Turn in assignments to the appropriate box assigned to your class and in a timely manner. 3. Sharpen pencils only during student work time and only until you hear the sharpener change pitch. 4. No hall ...
CHEM1100 Practice Exam 2 You have 120 minutes to complete this
... show your reasoning and all calculations in the bluebook. Report numerical answers with the correct number of significant figures and with correct units. No speaking is allowed during the exam. You must use the calculator you have. Once you complete the exam you may leave the room. Each question is ...
... show your reasoning and all calculations in the bluebook. Report numerical answers with the correct number of significant figures and with correct units. No speaking is allowed during the exam. You must use the calculator you have. Once you complete the exam you may leave the room. Each question is ...
model paper-1 - WordPress.com
... Enthalpies of formation of CO (g), CO2 (g), N2O (g) and N2O4(g) are -110, -393, 81 and 9.7 KJ/mol respectively. Find the value of ∆rH for the reaction: N2O4 (g) + 3CO (g) N2O (g) + 3CO2(g) 3M 15. a) State Hess’s law of constant heat summation. b) In a process, 701 J of heat is absorbed by a system ...
... Enthalpies of formation of CO (g), CO2 (g), N2O (g) and N2O4(g) are -110, -393, 81 and 9.7 KJ/mol respectively. Find the value of ∆rH for the reaction: N2O4 (g) + 3CO (g) N2O (g) + 3CO2(g) 3M 15. a) State Hess’s law of constant heat summation. b) In a process, 701 J of heat is absorbed by a system ...
Chapter 12 Review “Stoichiometry”
... 2S(s) + 3O2(g) → 2SO3(g): a) 2 atoms S + 3 molecules O2 → 2 molecules SO3, or b) 2 g S + 3 g O2 → 2 g SO3? ...
... 2S(s) + 3O2(g) → 2SO3(g): a) 2 atoms S + 3 molecules O2 → 2 molecules SO3, or b) 2 g S + 3 g O2 → 2 g SO3? ...
4. Sodium nitrite (NaNO2) is a controversial food preservative added
... 5. A 25.0 gram sample of a compound made up of magnesium, carbon and oxygen contains 7.20 grams magnesium and 3.55 grams carbon. a) Find the empirical formula of this compound. b) Find the mass percentage of each element in this compound. c) What is the mass of magnesium in a 13.9 gram sample of thi ...
... 5. A 25.0 gram sample of a compound made up of magnesium, carbon and oxygen contains 7.20 grams magnesium and 3.55 grams carbon. a) Find the empirical formula of this compound. b) Find the mass percentage of each element in this compound. c) What is the mass of magnesium in a 13.9 gram sample of thi ...
About writing chemical equations ppt
... 4. Coefficients 2 H2O are placed in front to balance the equation. One is never placed there, it is just understood. ...
... 4. Coefficients 2 H2O are placed in front to balance the equation. One is never placed there, it is just understood. ...
Rxn Types
... NaOH + CuSO4 The Na+ and Cu2+ switch places. Na+ combines with SO42- to form Na2SO4. Cu2+ combines with OH- to form Cu(OH)2 NaOH + CuSO4 Na2SO4 + Cu(OH)2 ...
... NaOH + CuSO4 The Na+ and Cu2+ switch places. Na+ combines with SO42- to form Na2SO4. Cu2+ combines with OH- to form Cu(OH)2 NaOH + CuSO4 Na2SO4 + Cu(OH)2 ...
50 frequently forgotten facts answer key
... 22) Electronegativity is an atom’s attraction to electrons in a chemical bond. [Table S] a) Which element, when bonded with O, will form the partially negative end of a polar covalent bond?____ F____ b) Which element has the greatest attraction to electrons when bonded to Na? 1) N 2) O 3) S 4) Al c) ...
... 22) Electronegativity is an atom’s attraction to electrons in a chemical bond. [Table S] a) Which element, when bonded with O, will form the partially negative end of a polar covalent bond?____ F____ b) Which element has the greatest attraction to electrons when bonded to Na? 1) N 2) O 3) S 4) Al c) ...
50 Frequently Forgotten Facts Answer Key
... 18) When nonmetal atoms form ions, they gain enough electrons to have a stable octet (8 valence electrons), and their dot diagrams are the nonmetal symbol, in brackets, with 8 dots and the - charge on the upper right, outside the brackets. [Periodic Table] a) What is the electron configuration of a ...
... 18) When nonmetal atoms form ions, they gain enough electrons to have a stable octet (8 valence electrons), and their dot diagrams are the nonmetal symbol, in brackets, with 8 dots and the - charge on the upper right, outside the brackets. [Periodic Table] a) What is the electron configuration of a ...
Enthalpy - Mr. Rowley
... The enthalpy of a system then comes from both the bonds holding the substance together, and the motion of the particles within the system. Although we cannot measure the enthalpy of a system, we can calculate the enthalpy changes during a reaction (ΔH˚). We also call this change in enthalpy the ...
... The enthalpy of a system then comes from both the bonds holding the substance together, and the motion of the particles within the system. Although we cannot measure the enthalpy of a system, we can calculate the enthalpy changes during a reaction (ΔH˚). We also call this change in enthalpy the ...
Honors Chemistry Semester 1 Exam Review
... 12. Which statement describes characteristics of an endothermic reaction? __The sign of H is positive, and the products have less potential energy than the reactants. __The sign of H is positive, and the products have more potential energy than the reactants. __The sign of H is negative, and the pro ...
... 12. Which statement describes characteristics of an endothermic reaction? __The sign of H is positive, and the products have less potential energy than the reactants. __The sign of H is positive, and the products have more potential energy than the reactants. __The sign of H is negative, and the pro ...
Chemistry I Exams and Keys 2014 Season
... A. They are both isomers of one another. B. They both represent the same compound. C. They have different empirical formulas. D. They are called isotopes of the same substance. E. They are called allotropes of the same substance. ...
... A. They are both isomers of one another. B. They both represent the same compound. C. They have different empirical formulas. D. They are called isotopes of the same substance. E. They are called allotropes of the same substance. ...
Section 11.1 Assessment How many mole ratios can be written for
... equation, how many of each (formula units, molecules and/or atoms)? Moles: from the balanced equation, how many of each? Mass: from the balanced equation, convert known mole quantities to mass of products total & compare to mass of reactants total, should be equal. ...
... equation, how many of each (formula units, molecules and/or atoms)? Moles: from the balanced equation, how many of each? Mass: from the balanced equation, convert known mole quantities to mass of products total & compare to mass of reactants total, should be equal. ...
Redox
![](https://commons.wikimedia.org/wiki/Special:FilePath/NaF.gif?width=300)
Redox reactions include all chemical reactions in which atoms have their oxidation state changed; in general, redox reactions involve the transfer of electrons between species. The term ""redox"" comes from two concepts involved with electron transfer: reduction and oxidation. It can be explained in simple terms: Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, these are only specific examples of a more general concept of reactions involving electron transfer.Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. Like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously. The oxidation alone and the reduction alone are each called a half-reaction, because two half-reactions always occur together to form a whole reaction. When writing half-reactions, the gained or lost electrons are typically included explicitly in order that the half-reaction be balanced with respect to electric charge.Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation state — the actual transfer of electrons may never occur. The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state. In practice, the transfer of electrons will always cause a change in oxidation state, but there are many reactions that are classed as ""redox"" even though no electron transfer occurs (such as those involving covalent bonds).There are simple redox processes, such as the oxidation of carbon to yield carbon dioxide (CO2) or the reduction of carbon by hydrogen to yield methane (CH4), and more complex processes such as the oxidation of glucose (C6H12O6) in the human body through a series of complex electron transfer processes.