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- An English chemistry professor needs a cup of hot tea before grading 50 homeworkassignments but his electric water heater is broken . In his lab, however, he doeshave some ethanol (CH3CH2OH, MW=46.07gmol-1) and 1 gram of benzoic acid(C6H5COOH, MW=122.12 gmol-1). He knows that the benzoic acid has an enthalpyof combustion, H, of -3226.7 kJmol-1. In a constant volume (bomb) calorimeterinitially at 293.15 K, he finds that the combustion of 1.000 g of benzoic acidincreased the temperature to 297.67 K. In the exact same calorimeter, 1.000 g ofethanol raised the temperature from 293.15K to 298.38K.(a) What is the enthalpy of combustion for 1 mole of ethanol? I am confused about this question and I need help.When a neutralization reaction was carried out using 100.0 mL of 0.7890M NH3 water and 100.0 mL of 0.7940M acetic acid, ΔT was found to be 4.76 °C. The specific heat of the reaction mixture was 4.104 J g-l K-1 and its density was 1.03 g mL-1. The calorimeter constant was 3.36 JK-1 a) Calculate ΔH neutralization for the reaction of NH3 and acetic acid. b) At the end of the experiment, it was discovered that the thermometer had not been calibrated. When it was calibrated, it was found that the thermometer read 0.50 °C low. What effect would this thermometer reading have on the reported DH neutralization calculated above? c) When the temperature-time data graph was reviewed, it was found that an error had been made in determining ΔT. Instead of 4.76 °C, ΔT was actually 4.70 °C. Based on this change only, calculate the correct ΔH neutralization for the reaction of NH3, and acetic acid. d) Calculate the percent error for the correct ΔH neutralization if aΔ DT of 4.76 °C had been used.…When a neutralization reaction was carried out using 100.0 mL of 0.7890M NH3 water and 100.0 mL of 0.7940M acetic acid, ΔT was found to be 4.76 °C. The specific heat of the reaction mixture was 4.104 J g-l K-1 and its density was 1.03 g mL-1. The calorimeter constant was 3.36 JK-1 a) Calculate ΔH neutralization for the reaction of NH3 and acetic acid. b) At the end of the experiment, it was discovered that the thermometer had not been calibrated. When it was calibrated, it was found that the thermometer read 0.50 °C low. What effect would this thermometer reading have on the reported DH neutralization calculated above? c) When the temperature-time data graph was reviewed, it was found that an error had been made in determining ΔT. Instead of 4.76 °C, ΔT was actually 4.70 °C. Based on this change only, calculate the correct ΔH neutralization for the reaction of NH3, and acetic acid. d) Calculate the percent error for the correct ΔH neutralization if aΔ DT of 4.76 °C had been used.…
- Calculate the ΔH°f of C6H12O6(s) from the following data: Show the complete and step by step solution ΔH combustion of C6H12O6(s) = -2816kJ/mol ΔH°f of CO2 (g) = -393.5 kJ/mol ΔH°f of H2O (l) = -285.9 kJ/mol Equation: C6H12O6(s) + O2(g) -> CO2(g) + H2O(l)At constant pressure and 25°C, what is ΔrH° for the following reaction2C2H6(g) + 7O2(g) → 4CO2(g) + H2O(l)if the complete consumption of 14.5 g of C2H6 liberates 752.3 kJ of heat energy?According to Schwabe and Wagner, the heats of combustion in a constant-volume calorimeter for fumaric and maleic acids are -1337.21 kJ mol-1 and -1360.43 kJ mol-1, respectively, at approximately 25 °C. What is the enthalpy of isomerization of maleic acid into fumaric acid in kJ mol-1?
- A pellet of benzoic acid standard was combusted in a bomb calorimeter to determine the experimental calorimeter constant. After 6 mins of monitoring the temperature, the bomb was fired. The following data were obtained. mole of benzoic acid: 0.0049 mol mass of burnt fuse wire: 0.0125 g qwire,surr: 5858 J/g ΔHcombustion of benzoic acid: -3228.0 kJ/mol Δng (combustion of benzoic acid): -0.5 mol R: 8.314 J/mol•K r1: 0ºC/min r2: 0ºC/min Tf: 30.4ºC Ti: 28.4ºC Determine the calorimeter constant (in J/ºC). Report your answer in 2 decimal places.At constant pressure and 25 C, what is the Delta rH for the following reaction: 2C2H6 (g) + 7O2(g) --> 4CO2(g) + H2O(l) if the complete consumption of 12.5g of C2H6 liberates 752.3 kJ of heat energy?At constant pressure and 25^C, What is delta H for the following reaction. 2C2H6(g) + 7O2(g) = 4CO2(g) + H2O(l) if the complete consumption of 38.2 g of C2H6 libraties 1981 KJ of heat energy?
- iven the data in the table below, ΔH°rxn for the reaction C2H5OH (l) + O2 (g) → CH3CO2H (l) + H2O (l) is ________ kJ. -79.0 -1048.0 -476.4 -492.6 The value of ΔH°f of O2 (g) is required for the calculation.A coffee-cup (constant pressure) calorimeter is used to carry out the following reaction in 63.5 mL water (where X is a hypothetical metal): X + 2 HCl → XCl2 + H2 In this process, the water temperature rose from 25.0 °C to 34.1 °C. If 0.00618 mol of "X" was consumed during the reaction, what is ΔrH of this reaction in kJ mol-1 with respect to "X"? The specific heat of water is 4.184 J g-1 °C-1 Express in 2 sig digs!Calculate the ∆Hof of C6H12O6(s) from the following data: ∆H combustion of C6H12O6(s) = -2816kJ/mol ∆Hof of CO2 (g) = -393.5 kJ/mol ∆Hof of H2O(l) = -285.9 kJ/mol Equation: C6H12O6(s) + O2(g) → CO2(g) + H2O(g)