Heat of reaction
... kJ/mol, while for condensation of water vapor, ΔH = 44.0 kJ/mol. • When a chemical equation is reversed the value of ΔH stays the same but the sign is reversed. ...
... kJ/mol, while for condensation of water vapor, ΔH = 44.0 kJ/mol. • When a chemical equation is reversed the value of ΔH stays the same but the sign is reversed. ...
CHEM121 Lecture Ch5 student
... How much carbon dioxide (in grams) is produced when 3.00 g of ethanol (C2H6O) combusts in air? How much oxygen gas is used up to combust 5.00 g of ethanol? ...
... How much carbon dioxide (in grams) is produced when 3.00 g of ethanol (C2H6O) combusts in air? How much oxygen gas is used up to combust 5.00 g of ethanol? ...
Unit 3: Chemical Kinetics
... This reaction does not occur in a single step, however, but rather through these two steps: Step 1: 2 NO → N2O2 Step 2: N2O2 + O2 → 2 NO2 Notice that if you add these two reactions together, you end up with the overall reaction: Step 1: 2 NO → N2O2 Step 2: N2O2 + O2 → 2 NO2 Overall: 2 NO(g) + O2 → ...
... This reaction does not occur in a single step, however, but rather through these two steps: Step 1: 2 NO → N2O2 Step 2: N2O2 + O2 → 2 NO2 Notice that if you add these two reactions together, you end up with the overall reaction: Step 1: 2 NO → N2O2 Step 2: N2O2 + O2 → 2 NO2 Overall: 2 NO(g) + O2 → ...
Ch. 8 Notes (Chemical Reactions) Teacher 2010
... The coefficients represent either the number of _________ molecules present. The coefficients can also represent _________ liters if the substances are gases. ...
... The coefficients represent either the number of _________ molecules present. The coefficients can also represent _________ liters if the substances are gases. ...
Chemical Reactions & Balancing Equations
... – same number of atoms of each type of element on each side What if it isn’t balanced already? ...
... – same number of atoms of each type of element on each side What if it isn’t balanced already? ...
Give reasons for the following: (i) Bond enthalpy of F2
... Helium mixed with oxygen under pressure is given to sea-divers for respiration. Air is not given to sea-divers because nitrogen present in air being soluble in blood will give a painful sensation called bends by bubbling out blood on moving from high pressure(in deep sea) to the atmospheric pressure ...
... Helium mixed with oxygen under pressure is given to sea-divers for respiration. Air is not given to sea-divers because nitrogen present in air being soluble in blood will give a painful sensation called bends by bubbling out blood on moving from high pressure(in deep sea) to the atmospheric pressure ...
CHEMISTRY
... Less E required The more active element replaces the less active one Most active metals (group 1) react w/water and produce metal hydroxides ...
... Less E required The more active element replaces the less active one Most active metals (group 1) react w/water and produce metal hydroxides ...
Sample
... ( ala ; R=CH3 , val; R=CH(CH3)2 , ser; R=CH2OH) b- Identify the type of bonds between the above ala-val? 5- Arrange the following elements in order of increasing electron affinity. Explain your answer? Na- Cl –S -Mg 6- Given the following experimental data, determine the rate law for the reaction: A ...
... ( ala ; R=CH3 , val; R=CH(CH3)2 , ser; R=CH2OH) b- Identify the type of bonds between the above ala-val? 5- Arrange the following elements in order of increasing electron affinity. Explain your answer? Na- Cl –S -Mg 6- Given the following experimental data, determine the rate law for the reaction: A ...
6-1 Endothermic and Exothermic Reactions
... q = specific heat of water x grams of water x change in temperature specific heat of water = 4.18 J /(g oC) grams of water = 50. change in temperature = final temperature - initial temperature There are 4.184 Joules in one calorie. Clean Up: Barium is a toxic metal and must be disposed of by EH&S. C ...
... q = specific heat of water x grams of water x change in temperature specific heat of water = 4.18 J /(g oC) grams of water = 50. change in temperature = final temperature - initial temperature There are 4.184 Joules in one calorie. Clean Up: Barium is a toxic metal and must be disposed of by EH&S. C ...
CHM 101
... The reactants in a chemical change have 487 kJ of energy. The change they undergo has a H = -157 kJ. The activation energy for the reaction is 570 kJ. a. Draw the energy vs reaction progress graph on the axes above paying attention to all values. Label a point that represents all products and one t ...
... The reactants in a chemical change have 487 kJ of energy. The change they undergo has a H = -157 kJ. The activation energy for the reaction is 570 kJ. a. Draw the energy vs reaction progress graph on the axes above paying attention to all values. Label a point that represents all products and one t ...
Name
... a. Theoretical yield b. Percentage yield c. Mole ratio d. Actual yield 14. For the reaction Cl2 + 2KBr → 2KCl +Br2, calculate the percentage yield if 200g of chlorine react with excess potassium bromide to produce 410g of bromine. a. 73.4% b. 82.1% c. 91.0% d. 98.9% 15. For the reaction Mg + 2HCl → ...
... a. Theoretical yield b. Percentage yield c. Mole ratio d. Actual yield 14. For the reaction Cl2 + 2KBr → 2KCl +Br2, calculate the percentage yield if 200g of chlorine react with excess potassium bromide to produce 410g of bromine. a. 73.4% b. 82.1% c. 91.0% d. 98.9% 15. For the reaction Mg + 2HCl → ...
final exam review packet
... A. The solution’s ___________________ point is higher. (when you cook pasta) B. The solution’s ___________________ point is lower. (when you add salt to roads in winter) C. These properties are called __________________properties because they depend on the concentration of solute but not the nature ...
... A. The solution’s ___________________ point is higher. (when you cook pasta) B. The solution’s ___________________ point is lower. (when you add salt to roads in winter) C. These properties are called __________________properties because they depend on the concentration of solute but not the nature ...
Chemical Reactions
... in the direction that removes heat from the system (In the above reaction you would decrease the amount of ...
... in the direction that removes heat from the system (In the above reaction you would decrease the amount of ...
Ionic Compounds 1. What is the formula for aluminum phosphate
... Solutions – Like Dissolves Like, Molarity, Reaction Types, Solubility 1. An unknown substance dissolves in water but not in benzene (a nonpolar solvent). Molecules of what type are present in the substance? 2. A 87.2-g sample of SrCl2 is dissolved in 112.5 mL of solution. Calculate the molarity of ...
... Solutions – Like Dissolves Like, Molarity, Reaction Types, Solubility 1. An unknown substance dissolves in water but not in benzene (a nonpolar solvent). Molecules of what type are present in the substance? 2. A 87.2-g sample of SrCl2 is dissolved in 112.5 mL of solution. Calculate the molarity of ...
97KB - NZQA
... This reaction is a decomposition reaction, as a single reactant (hydrogen peroxide) forms two products (water and oxygen). Heat a small amount of each white solid in a boiling-tube. The boiling tube should have a bung in it, with a delivery tube going into a test-tube of limewater. If the limewater ...
... This reaction is a decomposition reaction, as a single reactant (hydrogen peroxide) forms two products (water and oxygen). Heat a small amount of each white solid in a boiling-tube. The boiling tube should have a bung in it, with a delivery tube going into a test-tube of limewater. If the limewater ...
