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1) One hundred (100) ml of a 1.00 M solution of HCl is diluted with water...
3. When 10 mL of 2.0 M HCl is combined with 30 mL of 0.667 M...
3. When 10 mL of 2.0 M HCl is combined with 30 mL of 0.667 M NAOH a temperature change of 6.9 °C was observed. How much heat was given off per mole of water produced? ASsume the volumes are additive and that this NaCl solution has a density of 1.02 g/mL and a specific heat of 4.00 J/g-C. 2. How much heat is needed to change 32 g of 4.A 0.865 g sample of candy is burned in a...
1. Thermodynamics and acid solutions a) The following reaction occurs when HCl is bubbled into water...
1. Thermodynamics and acid solutions a) The following reaction occurs when HCl is bubbled into water at 25°C and latm pressure: HCl(g) -> H+(aq) + Cl (aq) Calculate AS rxn for this reaction. b) Sketch two possible structures of the hydronium ion in water. Circle the hydronium ion in each case. Also sketch the local structures of water surrounding the hydronium and chloride ions in aqueous solution. Include the important water molecules in both sets of sketches. c) Draw a...
18. In a calorimetry experiment, 0.1277 g af Me ribbon was added to 200.0 mL 0. HCl at 24.12 °C. The water temperat...
18. In a calorimetry experiment, 0.1277 g af Me ribbon was added to 200.0 mL 0. HCl at 24.12 °C. The water temperature increased to 27.10 °C. Calculate AH for reaction, as performed, and AH per mole of HCI. 19. A 2.50 g sample of sucrose (C2H220) was burned in excess oxygen in a car which contained 2.19 kg of water. The temperature of the water increased from 20. to 25.01 °C. Determine the molar heat of combustion of sucrose....
1. Calculate AH for the reaction C2H4 (8) + H2() → C2H6), from the following data....
1. Calculate AH for the reaction C2H4 (8) + H2() → C2H6), from the following data. C2H4 (g) + 3 02 (®) → 2 CO2 (s) + 2 H20 (1) C2H6 (g) + 7/2 02(g) → 2 CO2(g) + 3 H20 (1) H2 + 1/2O2() → H20 (1) AH = -1411. kJ/mole AH = -1560. kJ/mole AH = -285.8 kJ/mole 2. Calculate AH for the reaction 4 NH3(g) +502 (g) → 4 NO(g) + 6 H20 (g), from the following...
Predict the sign of AS for each of these changes. a) O2 (g) → O2 (aq)...
Predict the sign of AS for each of these changes. a) O2 (g) → O2 (aq) b) C.H. (8) → C.H. (1) - c) C(s) + CO2(g) → 2 CO (g) d) C12H22011 (8) ► 12H2011 (aq) e) 2 NO2(g) → N.04 (g) 2) Indicate the correct type of process for the following: Process Spontaneous Non-Spontaneous 1. Melting of ice cubes at -5°C and 1 atm pressure 2. Dissolution of sugar in a cup of hot coffee 3. Reaction of...
The thermochemical equation for the reaction is shown below: 4 Al(s) + 3 O2(g) → 2...
The thermochemical equation for the reaction is shown below: 4 Al(s) + 3 O2(g) → 2 Al2O3(s) AH - -3352 kJ How much heat is released when 8.07 g of Al react with Oz(g) at 25 °C and 1 atm? -1.68 x 104 kJ 0-104 kJ 0-754 kJ 0-2.50 x 102 kJ Which of the following processes is exothermic? o Water condensing from steam. The vaporization of water The melting of ice. O Heating water to form steam Select the...
m water, one of the following electrolyte, exists only as ions (100%) in solution a) nonconductor...
m water, one of the following electrolyte, exists only as ions (100%) in solution a) nonconductor b) weak electrolyte c) non electrolyte d) strong electrolyte The Following reaction is classified as: Mg(OH)2 (aq) + 2HNO3(aq) - Mg(NO)2 (aq) + 2 H20(1 a) oxidation-reduction reaction b) precipitation reaction b) acid-base neutralization reaction d) single replacement 9 Which one of the following is a weak acid in aqueous solution? a) KOH b) HNO3 c)NH; d) CH-COOH 10 Which of the following is...
Consider the following cell reaction at 18°C: Ca(e)+Cu+ (aq) + Ca2+ (aq) + Cu() Calculate the...
Consider the following cell reaction at 18°C: Ca(e)+Cu+ (aq) + Ca2+ (aq) + Cu() Calculate the standard cell potential of this cell from the standard electrode potentials, and from this, obtain AG" for the cell reaction. Calculate AF. Use these values of AN and AG to obtain AS for the cell reaction. Ca²+ (aq) +20 + Ca() --2.76 V Cu? (g) +20 + Cu(s) - 0.84 V AH;(O.*()) -- 542.8 kJ/mol AH;(Out (as)) - 64.8 kJ/mol V AG- AH- kJ...
A 77.0-ml sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of...
A 77.0-ml sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of a 0.226 M lead(II) nitrate solution and this reaction occurs: K2SO4(aq) + Pb(NO3)2 (aq) + 2 KNO3(aq) + PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 3.71 g. Determine the percent yield. 1 mole PbSO4 = 303.26 g Hydrazine, N2H4, is a liquid used as a rocket fuel. It reacts with oxygen to yield nitrogen gas and water....
The thermochemical equation for the reaction is shown below: 4 Al(s) + 3 O2(g) → 2...
The thermochemical equation for the reaction is shown below: 4 Al(s) + 3 O2(g) → 2 Al2O3(s) AH = -3352 kJ How much heat is released when 12.1 g of Al react with O2(g) at 25 °C and 1 atm? 0 - 104 kJ 0 -3.59 x 105 kJ -1.50 x 103 kJ O-376 kJ A 77.0-mL sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of a 0.226 M lead(II) nitrate solution and this reaction...
3. When 10 mL of 2.0 M HCl is combined with 30 mL of 0.667 M NAOH a temperature change of 6.9 °C was observed. How much heat was given off per mole of water produced? ASsume the volumes are additive and that this NaCl solution has a density of 1.02 g/mL and a specific heat of 4.00 J/g-C. 2. How much heat is needed to change 32 g of 4.A 0.865 g sample of candy is burned in a...
1. Thermodynamics and acid solutions a) The following reaction occurs when HCl is bubbled into water at 25°C and latm pressure: HCl(g) -> H+(aq) + Cl (aq) Calculate AS rxn for this reaction. b) Sketch two possible structures of the hydronium ion in water. Circle the hydronium ion in each case. Also sketch the local structures of water surrounding the hydronium and chloride ions in aqueous solution. Include the important water molecules in both sets of sketches. c) Draw a...
18. In a calorimetry experiment, 0.1277 g af Me ribbon was added to 200.0 mL 0. HCl at 24.12 °C. The water temperature increased to 27.10 °C. Calculate AH for reaction, as performed, and AH per mole of HCI. 19. A 2.50 g sample of sucrose (C2H220) was burned in excess oxygen in a car which contained 2.19 kg of water. The temperature of the water increased from 20. to 25.01 °C. Determine the molar heat of combustion of sucrose....
1. Calculate AH for the reaction C2H4 (8) + H2() → C2H6), from the following data. C2H4 (g) + 3 02 (®) → 2 CO2 (s) + 2 H20 (1) C2H6 (g) + 7/2 02(g) → 2 CO2(g) + 3 H20 (1) H2 + 1/2O2() → H20 (1) AH = -1411. kJ/mole AH = -1560. kJ/mole AH = -285.8 kJ/mole 2. Calculate AH for the reaction 4 NH3(g) +502 (g) → 4 NO(g) + 6 H20 (g), from the following...
Predict the sign of AS for each of these changes. a) O2 (g) → O2 (aq) b) C.H. (8) → C.H. (1) - c) C(s) + CO2(g) → 2 CO (g) d) C12H22011 (8) ► 12H2011 (aq) e) 2 NO2(g) → N.04 (g) 2) Indicate the correct type of process for the following: Process Spontaneous Non-Spontaneous 1. Melting of ice cubes at -5°C and 1 atm pressure 2. Dissolution of sugar in a cup of hot coffee 3. Reaction of...
The thermochemical equation for the reaction is shown below: 4 Al(s) + 3 O2(g) → 2 Al2O3(s) AH - -3352 kJ How much heat is released when 8.07 g of Al react with Oz(g) at 25 °C and 1 atm? -1.68 x 104 kJ 0-104 kJ 0-754 kJ 0-2.50 x 102 kJ Which of the following processes is exothermic? o Water condensing from steam. The vaporization of water The melting of ice. O Heating water to form steam Select the...
m water, one of the following electrolyte, exists only as ions (100%) in solution a) nonconductor b) weak electrolyte c) non electrolyte d) strong electrolyte The Following reaction is classified as: Mg(OH)2 (aq) + 2HNO3(aq) - Mg(NO)2 (aq) + 2 H20(1 a) oxidation-reduction reaction b) precipitation reaction b) acid-base neutralization reaction d) single replacement 9 Which one of the following is a weak acid in aqueous solution? a) KOH b) HNO3 c)NH; d) CH-COOH 10 Which of the following is...
Consider the following cell reaction at 18°C: Ca(e)+Cu+ (aq) + Ca2+ (aq) + Cu() Calculate the standard cell potential of this cell from the standard electrode potentials, and from this, obtain AG" for the cell reaction. Calculate AF. Use these values of AN and AG to obtain AS for the cell reaction. Ca²+ (aq) +20 + Ca() --2.76 V Cu? (g) +20 + Cu(s) - 0.84 V AH;(O.*()) -- 542.8 kJ/mol AH;(Out (as)) - 64.8 kJ/mol V AG- AH- kJ...
A 77.0-ml sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of a 0.226 M lead(II) nitrate solution and this reaction occurs: K2SO4(aq) + Pb(NO3)2 (aq) + 2 KNO3(aq) + PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 3.71 g. Determine the percent yield. 1 mole PbSO4 = 303.26 g Hydrazine, N2H4, is a liquid used as a rocket fuel. It reacts with oxygen to yield nitrogen gas and water....
The thermochemical equation for the reaction is shown below: 4 Al(s) + 3 O2(g) → 2 Al2O3(s) AH = -3352 kJ How much heat is released when 12.1 g of Al react with O2(g) at 25 °C and 1 atm? 0 - 104 kJ 0 -3.59 x 105 kJ -1.50 x 103 kJ O-376 kJ A 77.0-mL sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of a 0.226 M lead(II) nitrate solution and this reaction...
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