Chemistry Midterm Review 2006
... 3. Draw in the activation energy for each line. Label the pathways as “with catalyst” & “without the catalyst”. Which line represents the faster reaction. 4. On the pathway to the left, label the activated complex, activation energy, reactants, products, and enthalpy released or absorbed by the reac ...
... 3. Draw in the activation energy for each line. Label the pathways as “with catalyst” & “without the catalyst”. Which line represents the faster reaction. 4. On the pathway to the left, label the activated complex, activation energy, reactants, products, and enthalpy released or absorbed by the reac ...
Thermochemistry - Piedra Vista High School
... = [cΔH0f (C) + dΔH0f (D) ] - [aΔH0f (A) + bΔH0f (B) ] 0 (reactants) ...
... = [cΔH0f (C) + dΔH0f (D) ] - [aΔH0f (A) + bΔH0f (B) ] 0 (reactants) ...
C2 revision slides V3 + questions + MS – F
... move faster and collide more often. More particles have energy greater than the activation energy so more successful collisions Catalyst: Catalysts change the rate of chemical reactions but are not used up during the reaction. Different reactions need different catalysts. Catalysts are important in ...
... move faster and collide more often. More particles have energy greater than the activation energy so more successful collisions Catalyst: Catalysts change the rate of chemical reactions but are not used up during the reaction. Different reactions need different catalysts. Catalysts are important in ...
Test - Angelfire
... ← 2HI ( g ) Which of the following will cause the rate of the forward reaction to decrease? A. ...
... ← 2HI ( g ) Which of the following will cause the rate of the forward reaction to decrease? A. ...
IB:Enthalpy Review Questions
... d) If the bonds made are less strong than those broken, will the enthalpy change be positive or negative? e) Will the formation of Cl2O from its elements be and endothermic or exothermic process? 3. When 8.0 g of ammonium nitrate was dissolved in 100 cm3 of water the temperature fell from 19.0
... d) If the bonds made are less strong than those broken, will the enthalpy change be positive or negative? e) Will the formation of Cl2O from its elements be and endothermic or exothermic process? 3. When 8.0 g of ammonium nitrate was dissolved in 100 cm3 of water the temperature fell from 19.0
Types of Chemical Reactions
... 2. For each of the following reactants, use the activity series to determine whether the reaction would take place or not. If no reaction takes place, write NR in the blank. If a reaction does take place, write the formulas for the products of the reaction. (Hint: If an active metal replaces the hyd ...
... 2. For each of the following reactants, use the activity series to determine whether the reaction would take place or not. If no reaction takes place, write NR in the blank. If a reaction does take place, write the formulas for the products of the reaction. (Hint: If an active metal replaces the hyd ...
Question 1. Phosgene was used during the World War - IQ
... Consider half-cell A and B, draw an electrochemical cell with spontaneous reaction (write the global equation) and calculate the cell potential. Furthermore, you need to indicate: the flow of electrons, cathode and anode. (b) Metallic copper (Cu0) can be dissolved by HNO3(conc) and it is observed th ...
... Consider half-cell A and B, draw an electrochemical cell with spontaneous reaction (write the global equation) and calculate the cell potential. Furthermore, you need to indicate: the flow of electrons, cathode and anode. (b) Metallic copper (Cu0) can be dissolved by HNO3(conc) and it is observed th ...
List of Definitions for AS Chemistry
... concentration of that reactant is raised in an experimentally determined rate equation / rate law. ...
... concentration of that reactant is raised in an experimentally determined rate equation / rate law. ...
Document
... free metals that become combined change of oxidation states double replacement reactions are not redox Determine most reactive metal Substance oxidized is higher on the table ...
... free metals that become combined change of oxidation states double replacement reactions are not redox Determine most reactive metal Substance oxidized is higher on the table ...
Question paper - Edexcel
... (ii) An equilibrium was reached when the amounts of substances shown in the table below were used. Complete the table to show the amounts of each substance present at equilibrium. ...
... (ii) An equilibrium was reached when the amounts of substances shown in the table below were used. Complete the table to show the amounts of each substance present at equilibrium. ...
Unit 6 Naming Binary Compounds
... Glass is sometimes decorated by etching patterns on its surface. Etching occurs when hydrofluoric acid reacts with silicon dioxide in the glass to form gaseous silicon tetrafluoride and liquid water. Write and balance the equation for this reaction. ...
... Glass is sometimes decorated by etching patterns on its surface. Etching occurs when hydrofluoric acid reacts with silicon dioxide in the glass to form gaseous silicon tetrafluoride and liquid water. Write and balance the equation for this reaction. ...
Chapter 13…States of Matter
... 4. Calculate the amount of energy required to heat a 150 g chunk of aluminum from 20C to 40C. (Cp of aluminum = 0.220 cal/gC) H=mCpT (150g)(.22)(20) = 660 cal Chapters 17& 18…Reaction Rates & Equilibrium Define: 1. Equilibrium: the reaction occurs simultaneously in both directions. 2. Activate ...
... 4. Calculate the amount of energy required to heat a 150 g chunk of aluminum from 20C to 40C. (Cp of aluminum = 0.220 cal/gC) H=mCpT (150g)(.22)(20) = 660 cal Chapters 17& 18…Reaction Rates & Equilibrium Define: 1. Equilibrium: the reaction occurs simultaneously in both directions. 2. Activate ...
Name ……………………………..………...… …….. Index No
... 7. In an experiment to determine the molar heat of neutralization of hydrochloric acid with sodium hydroride, students of Kassu Secondary school reacted 100cm3 of 1M hydrochloric acid with 50cm3 of 2M sodium hydroxide solution. They obtained the following results. Initial temperature of acid = 25.00 ...
... 7. In an experiment to determine the molar heat of neutralization of hydrochloric acid with sodium hydroride, students of Kassu Secondary school reacted 100cm3 of 1M hydrochloric acid with 50cm3 of 2M sodium hydroxide solution. They obtained the following results. Initial temperature of acid = 25.00 ...
Topic 6 Kinetics File
... increase of number of moles of gaseous molecules; 2) change of state from solid to liquid or liquid to gas; 3) increase of temperature Exothermic: A reaction in which energy is evolved. ΔH is –. Products more stable than reactants. Gibb’s free energy: Must be negative for reaction to be spontaneous. ...
... increase of number of moles of gaseous molecules; 2) change of state from solid to liquid or liquid to gas; 3) increase of temperature Exothermic: A reaction in which energy is evolved. ΔH is –. Products more stable than reactants. Gibb’s free energy: Must be negative for reaction to be spontaneous. ...
2009
... 19. What volume of oxygen (in litres) would be required for the complete combustion of a gaseous mixture containing 1 litre of carbon monoxide and 3 litres of hydrogen? (All volumes are measured at the same temperature and pressure.) A 1 B ...
... 19. What volume of oxygen (in litres) would be required for the complete combustion of a gaseous mixture containing 1 litre of carbon monoxide and 3 litres of hydrogen? (All volumes are measured at the same temperature and pressure.) A 1 B ...
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.