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The amount of heat released when the above reactions are
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20.)...
help The value of H° for the reaction below is -1107 kJ: 2Ba (s) + O2...
help The value of H° for the reaction below is -1107 kJ: 2Ba (s) + O2 (g) 2BaO (s) How many kJ of heat are released when 5.75 g of Ba (s) reacts completely with oxygen to form BaO (s)? 23.2 kJ 26.3 kJ 96.3 kJ 46.4 kJ 193 kJ
QUESTION 1 According to the following thermochemical equation, what mass of HF (in g) must react...
QUESTION 1 According to the following thermochemical equation, what mass of HF (in g) must react in order to produce 345 kJ of energy? Assume excess SiO2. SiO2(s) + 4 HF(g) SiF4(g) + 2 H20) AH®rxn = -184 kJ 1079 150.9 173 g 37.59 QUESTION 2 The value of AH® for the reaction below is -1107 kJ: 2Ba (s) + O2(g) + 2Bao (s) How many kJ of heat are released when 5.75 g of Bao (s) is produced? 96.3...
please show me how to get the correct answers in preperation for my upcoming exam 14.) A 15.) B 14. Given: 2 Al(s) +...
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14.) A 15.) B
14. Given: 2 Al(s) + 3/2 O2(g) - Al2O3(s) Hºe - -1670 kJ for Al2O3(s) What is AH for the following reaction? 2 A1,0, (s) - 4 Al(s) + 3 O2(g) Hºrn - ? A. 3340 kJ B. 1670 kJ C. -3340 kJ D. -1670 kJ E . -835 kJ 15. Given the following thermochemical equation: 2 SO2(g) + O2(g) -...
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2.) D 3.) B 4.) D
2) A 5.00-g sample of copper metal at 25.0°C is heated by the addition of 133 J of energy. The final temperature of the copper is °C. The specific heat capacity of copper is 0.38 J/g-K. A) 45.0 B) 25.0 C) 70.0 D) 95.0 E) 35.1 250 3) The value of AE for a system that performs 151 kJ...
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12.) C
12) In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water: CH4 (8) +202 (8) -- CO2 (g) + 2H20 (1) AH =-890.0 kJ Calculate the value of q (kl) in this exothermic reaction when 1.80 g of methane is combusted at constant pressure. A) 0.0324 kJ B) -1.00 x 105 kJ C) -100.1...
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6.) E 10.) B 12.) C
6) The density of nitric oxide (NO) gas at0.970 atm and 34.9 °C is A) 0.0384 B) 10.2 C) 0.869 8/L. D) 0.339 E) 1.15 10) A pressure vessel contains CO2 (PCO2 = 3.78 atm) and O2 (P02 -6 atm) gases at a total pressure of 9.78 atm. What is the mole-fraction of CO2 and O2 gases, respectively? A)...
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27.) C 28.) B 29.) B
27) The value of AHº for the reaction below is +128.1 kJ: CH3OH (1) CO (g) + 2H2 (g) How much heat is consumed when 87.1 g of hydrogen gas is formed? A) -2.76x103 kJ B) -128.1 kJ C) 2.76 x103 kJ D) -5.52 x103 kJ E) 5.52 x103 kJ 28) How many joules of heat are absorbed when...
According to the following reaction, how much energy is evolved during the reaction of 32.5 g...
According to the following reaction, how much energy is evolved during the reaction of 32.5 g B2H6 and 72.5 g Cl2? The molar mass of B2H6 is 27.67 g/mol B2H6(g)6 Cl2(g)2 BCI3(g) +6 HCl(g) AHorxn-1396 kJ O 238 kJ O 1640 kJ O 429 kJ O 1430 kJ O 3070 kJ QUESTION 2 0.5 points Save Answer The value of AH° for the reaction below is -1107 kJ: 2Ва (s) + O2 (g) — 2ВаО (s) How many kJ of...
please show me how to get the correct answers in preperation for my upcoming exam 22.) E 23.) D 22) During volcanic...
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22.) E 23.) D
22) During volcanic eruptions, hydrogen sulfide gas is given off and oxidized by air according to the following chemical equation: 2H2S(g) + 302(g) - 2802(g) + 2H2O(g) Calculate the standard enthalpy change for the above reaction given: 3S(s) + 2H2O(g) → 2H2S(g) + SO2(g) AH° = 146.9 kJ/mol S(s) + O2(g) → SO2(g) AH°= -296.4 kJ/mol A) 443.3 kJ/mol B) 742.3...
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11.) D 12.) C
11. If 325 g of water at 4.20°C absorbs 12.28 kJ of heat, what is the final temperature of the water? A. 4.21°C B. 4.80°C c. 9.00°C D . 13.2°CE . 2938°C 12. Naphthalene combustion can be used to calibrate the heat capacity of a bomb calorimeter. The heat of combustion of naphthalene is -40.1 kJ/g. When 0.8210 ao naphthalene was...
QUESTION 1 According to the following thermochemical equation, what mass of HF (in g) must react in order to produce 345 kJ of energy? Assume excess SiO2. SiO2(s) + 4 HF(g) SiF4(g) + 2 H20) AH®rxn = -184 kJ 1079 150.9 173 g 37.59 QUESTION 2 The value of AH® for the reaction below is -1107 kJ: 2Ba (s) + O2(g) + 2Bao (s) How many kJ of heat are released when 5.75 g of Bao (s) is produced? 96.3...
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14.) A 15.) B
14. Given: 2 Al(s) + 3/2 O2(g) - Al2O3(s) Hºe - -1670 kJ for Al2O3(s) What is AH for the following reaction? 2 A1,0, (s) - 4 Al(s) + 3 O2(g) Hºrn - ? A. 3340 kJ B. 1670 kJ C. -3340 kJ D. -1670 kJ E . -835 kJ 15. Given the following thermochemical equation: 2 SO2(g) + O2(g) -...
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2.) D 3.) B 4.) D
2) A 5.00-g sample of copper metal at 25.0°C is heated by the addition of 133 J of energy. The final temperature of the copper is °C. The specific heat capacity of copper is 0.38 J/g-K. A) 45.0 B) 25.0 C) 70.0 D) 95.0 E) 35.1 250 3) The value of AE for a system that performs 151 kJ...
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12.) C
12) In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water: CH4 (8) +202 (8) -- CO2 (g) + 2H20 (1) AH =-890.0 kJ Calculate the value of q (kl) in this exothermic reaction when 1.80 g of methane is combusted at constant pressure. A) 0.0324 kJ B) -1.00 x 105 kJ C) -100.1...
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6.) E 10.) B 12.) C
6) The density of nitric oxide (NO) gas at0.970 atm and 34.9 °C is A) 0.0384 B) 10.2 C) 0.869 8/L. D) 0.339 E) 1.15 10) A pressure vessel contains CO2 (PCO2 = 3.78 atm) and O2 (P02 -6 atm) gases at a total pressure of 9.78 atm. What is the mole-fraction of CO2 and O2 gases, respectively? A)...
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27.) C 28.) B 29.) B
27) The value of AHº for the reaction below is +128.1 kJ: CH3OH (1) CO (g) + 2H2 (g) How much heat is consumed when 87.1 g of hydrogen gas is formed? A) -2.76x103 kJ B) -128.1 kJ C) 2.76 x103 kJ D) -5.52 x103 kJ E) 5.52 x103 kJ 28) How many joules of heat are absorbed when...
According to the following reaction, how much energy is evolved during the reaction of 32.5 g B2H6 and 72.5 g Cl2? The molar mass of B2H6 is 27.67 g/mol B2H6(g)6 Cl2(g)2 BCI3(g) +6 HCl(g) AHorxn-1396 kJ O 238 kJ O 1640 kJ O 429 kJ O 1430 kJ O 3070 kJ QUESTION 2 0.5 points Save Answer The value of AH° for the reaction below is -1107 kJ: 2Ва (s) + O2 (g) — 2ВаО (s) How many kJ of...
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22.) E 23.) D
22) During volcanic eruptions, hydrogen sulfide gas is given off and oxidized by air according to the following chemical equation: 2H2S(g) + 302(g) - 2802(g) + 2H2O(g) Calculate the standard enthalpy change for the above reaction given: 3S(s) + 2H2O(g) → 2H2S(g) + SO2(g) AH° = 146.9 kJ/mol S(s) + O2(g) → SO2(g) AH°= -296.4 kJ/mol A) 443.3 kJ/mol B) 742.3...
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11.) D 12.) C
11. If 325 g of water at 4.20°C absorbs 12.28 kJ of heat, what is the final temperature of the water? A. 4.21°C B. 4.80°C c. 9.00°C D . 13.2°CE . 2938°C 12. Naphthalene combustion can be used to calibrate the heat capacity of a bomb calorimeter. The heat of combustion of naphthalene is -40.1 kJ/g. When 0.8210 ao naphthalene was...
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