Chapter 5: thermochemstry
... More on hess’ law • Hess' law allows ΔH rxn to be calculated even when it can’t be measured directly. • To do this, we perform arithmetic operations on chemical equations and known ΔH values. – Chemical equations may be multiplied or divided by a whole number. – When an equation is multiplied by a c ...
... More on hess’ law • Hess' law allows ΔH rxn to be calculated even when it can’t be measured directly. • To do this, we perform arithmetic operations on chemical equations and known ΔH values. – Chemical equations may be multiplied or divided by a whole number. – When an equation is multiplied by a c ...
Topic 5 - Chemical Reactions
... neutralization (HX+MOH H2O + MX) combustion (CxHy + O2 CO2 + H2O). Kinetics is the study of reaction rates. Several factors affect reaction rates, including temperature, concentration, surface area, and the presence of a catalyst. Reaction rates/kinetics are affected by activation energy, cata ...
... neutralization (HX+MOH H2O + MX) combustion (CxHy + O2 CO2 + H2O). Kinetics is the study of reaction rates. Several factors affect reaction rates, including temperature, concentration, surface area, and the presence of a catalyst. Reaction rates/kinetics are affected by activation energy, cata ...
Lab #4: Chemical Reactions
... one minute, light a wooden splint with a Bunsen burner, then remove your thumb and hold the burning splint to the mouth of the test tube. You will hear a sound when the H2 gas that was produced in reaction C-2 undergoes a second reaction when it reaction with oxygen. Dispose of the solution from thi ...
... one minute, light a wooden splint with a Bunsen burner, then remove your thumb and hold the burning splint to the mouth of the test tube. You will hear a sound when the H2 gas that was produced in reaction C-2 undergoes a second reaction when it reaction with oxygen. Dispose of the solution from thi ...
Chapter 5
... Catabolic and Anabolic Reactions A metabolic pathway is a sequence of enzymatically catalyzed chemical reactions in a cell Metabolic pathways are determined by enzymes Enzymes are encoded by genes ...
... Catabolic and Anabolic Reactions A metabolic pathway is a sequence of enzymatically catalyzed chemical reactions in a cell Metabolic pathways are determined by enzymes Enzymes are encoded by genes ...
Experiment 11 CHEMICAL REACTIONS
... Get a “gas collecting bottle” from the reagent bench and take it and your cover glass to the hood where the instructor will ignite a sample of phosphorus in a “def lagrating spoon” and lower it briefly into your gas bottle. As soon as the spoon is removed, rapidly place the cover glass over the mout ...
... Get a “gas collecting bottle” from the reagent bench and take it and your cover glass to the hood where the instructor will ignite a sample of phosphorus in a “def lagrating spoon” and lower it briefly into your gas bottle. As soon as the spoon is removed, rapidly place the cover glass over the mout ...
Matter_and_Change2
... 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. ...
Matter_and_Change
... EXTENSIVE physical property DOES depend on the amount of material present (e.g. mass, volume) ...
... EXTENSIVE physical property DOES depend on the amount of material present (e.g. mass, volume) ...
AP® Chemistry 2009 Free-Response Questions Form B
... It is observed that when silver metal is placed in aqueous thallium(I) fluoride, TlF, no reaction occurs. When the switch is closed in the cell represented above, the voltage reading is +1.14 V. (a) Write the reduction half-reaction that occurs in the cell. (b) Write the equation for the overall rea ...
... It is observed that when silver metal is placed in aqueous thallium(I) fluoride, TlF, no reaction occurs. When the switch is closed in the cell represented above, the voltage reading is +1.14 V. (a) Write the reduction half-reaction that occurs in the cell. (b) Write the equation for the overall rea ...
matter and - cloudfront.net
... Physical Change- Alters a given material without changing its composition. • Cutting • Grinding • Bending • Melting • Boiling • Freezing ...
... Physical Change- Alters a given material without changing its composition. • Cutting • Grinding • Bending • Melting • Boiling • Freezing ...
Chemical Reactions
... Describing Chemical Change: • Chemical equations: using chemical formulas to describe in writing a chemical reaction • The arrow separates the formulas of the reactants from the formulas of the products ...
... Describing Chemical Change: • Chemical equations: using chemical formulas to describe in writing a chemical reaction • The arrow separates the formulas of the reactants from the formulas of the products ...
CH 5-7 Chapter 5-7 review wkey
... How many moles of H+ are associated with the acid, H2SO3, during neutralization? a) 0 ...
... How many moles of H+ are associated with the acid, H2SO3, during neutralization? a) 0 ...
Organic Chemical Reactions
... All these concepts are conveniently depicted using energy vs. reaction profiles (Figure 4). The top profile is a one-step process, with no intermediates and one transition state corresponding to the single step from reactants to products. The total variation in free energy is negative (thus the reac ...
... All these concepts are conveniently depicted using energy vs. reaction profiles (Figure 4). The top profile is a one-step process, with no intermediates and one transition state corresponding to the single step from reactants to products. The total variation in free energy is negative (thus the reac ...
File - wilson science WEBSITE
... 8. For a certain reactions at 25oC, the value of K is 1.2 x 10-3. At 50oC, the value of K is 3.4 x 10-1. This means that the reaction is a. exothermic b. endothermic c. more information is needed 9. Given the equation A(g) ↔ B(g) + 2C(g). At a particular temperature, K = 1.4 x 105. If you initially ...
... 8. For a certain reactions at 25oC, the value of K is 1.2 x 10-3. At 50oC, the value of K is 3.4 x 10-1. This means that the reaction is a. exothermic b. endothermic c. more information is needed 9. Given the equation A(g) ↔ B(g) + 2C(g). At a particular temperature, K = 1.4 x 105. If you initially ...
Practice Test 1 (Chapters 1-7)
... e. none of these 58. CH4(g) + 2O2(g) CO2(g) + 2H2O(g) a. oxidation-reduction b. synthesis c. decomposition d. combustion e. two of these ...
... e. none of these 58. CH4(g) + 2O2(g) CO2(g) + 2H2O(g) a. oxidation-reduction b. synthesis c. decomposition d. combustion e. two of these ...
Document
... it is bonded to metals in binary compounds. In these cases, its oxidation number is –1. 5. Group IA metals are +1, IIA metals are +2 and fluorine is always –1. 6. The sum of the oxidation numbers of all the atoms in a molecule or ion is equal to the charge on the molecule or ion. ...
... it is bonded to metals in binary compounds. In these cases, its oxidation number is –1. 5. Group IA metals are +1, IIA metals are +2 and fluorine is always –1. 6. The sum of the oxidation numbers of all the atoms in a molecule or ion is equal to the charge on the molecule or ion. ...
Enthalpy - ChemGod.com
... Consider the following reaction: 2 H2 (g) + O2 (g) 2 H2O (g) If Hrxn < 0, it means: A) The products have less energy than the reactants – you could make a hot pack. B) The reactants have less energy than the products – you could make a cold pack. C) The products have less energy than the reactan ...
... Consider the following reaction: 2 H2 (g) + O2 (g) 2 H2O (g) If Hrxn < 0, it means: A) The products have less energy than the reactants – you could make a hot pack. B) The reactants have less energy than the products – you could make a cold pack. C) The products have less energy than the reactan ...
Test 8 Review
... energy change (ΔG) predicts whether or not a reaction is spontaneous. It is the difference between the energy change (ΔH) and the product of the absolute or Kelvin temperature (T) and the entropy change (ΔS). Reaction rates. The speed of chemical reactions depends on several factors: [1] Nature of r ...
... energy change (ΔG) predicts whether or not a reaction is spontaneous. It is the difference between the energy change (ΔH) and the product of the absolute or Kelvin temperature (T) and the entropy change (ΔS). Reaction rates. The speed of chemical reactions depends on several factors: [1] Nature of r ...
Experiment #5 WHERE`S THE EVIDENCE
... physical property. Color, hardness, and texture are other physical properties. A chemical property is a characteristic of a substance that describes its ability to change into other substances. To observe the chemical properties of a substance, you must change it into another substance. For example, ...
... physical property. Color, hardness, and texture are other physical properties. A chemical property is a characteristic of a substance that describes its ability to change into other substances. To observe the chemical properties of a substance, you must change it into another substance. For example, ...
Catalysis
Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst. With a catalyst, reactions occur faster and require less activation energy. Because catalysts are not consumed in the catalyzed reaction, they can continue to catalyze the reaction of further quantities of reactant. Often only tiny amounts are required.