Calculate the approximate enthalpy change, AHxn, for the combustion of one mole of methane a shown in the balar chemical equation: CH4 + 202→2H2O+CO2 Use the values you calculated in Parts A, B, C, and D, keeping in mind the stoichiometric coefficients. Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HẢ ? ΔΗ Value Units Submit

Calculate the approximate enthalpy change, AHxn, for the combustion of one mole of methane a shown in the balar chemical equation: CH4 + 202→2H2O+CO2 Use the values you calculated in Parts A, B, C, and D, keeping in mind the stoichiometric coefficients. Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HẢ ? ΔΗ Value Units Submit

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter9: Energy And Chemistry

Section: Chapter Questions

Problem 9.94PAE

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sodty given and solutions only no need for explanation THERMODYNAMICS: The combustion of 1.00 mol of glucose (C6H12O6) liberates 2820 kJ of heat. If 1.66 g of glucose is burned in a calorimeter containing 865 g of water, and the temperature of the assembly increases from 20.10oC to 24.99oC, what is the heat capacity of the calorimeter in kJ/oC? MW of glucose is 180 g/mol. (Round off the final answer to TWO decimal places. Do not include the unit.)
a) What is the standard enthalpy of reaction per mole of either HCl or NaOH when 50.00 cm3 of 0.1 moldm-3 of hydrochloric acid (HCl) and 50.00 cm3 of 0.1 moldm-3 of sodium hydroxide (NaOH) are mixed? According to your simulation, the temperature rose by 0.68 oC. (Density of water = 1gcm-3, Specific heat capacity of water = 4.18 J g-1 oC-1) b) What is the standard enthalpy of reaction per mole of KOH when 50.00 cm3 of 1.0 moldm-3 of Nitric Acid (HNO3) and 50.00 cm3 of 1.0 moldm-3 of Potassium Hydroxide (KOH) are mixed? According to your simulation, the temperature rose by __6.81__ oC. (Density of water = 1gcm-3, Specific heat capacity of water = 4.18 J g-1 oC-1)
The formulas give the enthalpy when Coal and Methane react with oxygen:C+O2->CO2+394 kJ/mol, 12 gram C gives 44 gram of CO2+394 kJCH4+ O2->CO2+2H2O+891 kJ/mol, 16 gram CH4gives 44 gram of CO2+891kJ 1-Calculate the heating value of Coal and Methane in MJ/kg and in kWh/kg.Calculate the lower heating value for Methane. 2-Calculate the amount of CO2 which is produced per kWh for Coal and Methane
a) What is the standard enthalpy of reaction per mole of either HCl or NaOH when 50.00 cm3 of 0.1 moldm-3 of hydrochloric acid (HCl) and 50.00 cm3 of 0.1 moldm-3 of sodium hydroxide (NaOH) are mixed? According to your simulation, the temperature rose by 0.68 oC. (Density of water = 1gcm-3, Specific heat capacity of water = 4.18 J g-1 oC-1) Show your working below:
1. Calculate the standard enthalpy of formation of C10H10. Its standard enthalpy of combustion is shown by the equation: 2C10H10 (l) + 25O2 (g) → 20CO2 (g) + 10H2O (l) ∆H = 10,314 KJ/mol The standard heat of formation (KJ/mol) at 298.15oC : CO2 = -393.5 ; H2O(l) = -285.8 2. Determine ΔG° at 298.15K for the reaction: 4Fe (s) + 3O2 (g) → 2Fe2O3 (s) Given that ΔH° = -1648 kJ ; ΔS° = -549.3 J/K 3. In the picture, Find the the ∆H°rxn if ∆G°rxn is 420 kJ/mol and ∆S°rxn is -143 J/mol*k
The standard enthalpies of formation of gaseous propyne (C3H4)(C3H4), propylene (C3H6)(C3H6), and propane (C3H8)(C3H8) are +185.4, +20.4, and -103.8 kJ/molkJ/mol, respectively. Calculate the heat evolved per mole on combustion of each substance to yield CO2(g)CO2(g) and H2O(g)H2O(g). Express your answers to four significant figures separated by commas.
The following formulas give the enthalpy, when Coal and Methane react with oxygen: C+O2->CO2+394 kJ/mol, 12 gram C gives 44 gram of CO2+394 kJ CH4+ O2->CO2+2H2O+891 kJ/mol, 16 gram CH4 gives 44 gram of CO2+891kJ a) Calculate the heating value of Coal and Methane in MJ/kg and in kWh/kg. b) Calculate the amount of CO2 which is produced per kWh for Coal and Methane. Give it in kg/kWh.
The standard enthalpies of formation of gaseous propyne (C3H4), propylene (C3H6), and propane (C3H8) are +185.4, +20.4 , and -103.8kJ/mol, Calculate the heat evolved per mole on combustion of each substance to yield CO2(g) and H2O(g). Calculate the heat evolved on combustion of 1 kg of each substance. 3. Which is the most efficient fuel in terms of heat evolved per unit mass?
The heat of combustion of carbon, hydrogen and sucrose are 394.82, -289.28 and -5665.8kj/mol resp. What is the enthalpy of formation of sucrose?
The standard enthalpy change of combustion [to CO2(g) and H2O()] at 25°C of the organic solid 9,10-phenanthrenediol, C14H10O2(s), is determined to be -6482.1 kJ mol-1. What is the Hf° of C14H10O2(s) based on this value? Use the following data: Hf° H2O () = -285.83 kJ mol-1 ; Hf° CO2(g) = -393.51 kJ mol-1
Calculate the heat released/absorbed by the reaction (qrxn) between nitric acid and potassium hydroxide. Express your answer in kJ. Given: A newly made Styrofoam ball calorimeter was first calibrated by mixing in it 10.0 mL of 0.40 M hydrochloric acid and 0.1008 g magnesium oxide (MW = 40.30 g/mol; specific heat = 0.276 kJ/g°C). The reaction enthalpy (ΔHrxn) of HCl and MgO is -139.6 kJ/mol. The temperature change was recorded to be 5.5 °C. After calibration, the calorimeter was used to determine reaction enthalpy of nitric acid and potassium hydroxide by mixing in it 5.0 mL of 0.40 M HNO3 and 5.0 mL of 0.80 M KOH. The temperature change was recorded to be 1.0 °C.
The specific heat of compound AB(s) was determined using coffee-cup calorimeter. When 1.750 g of AB(s) was mixed with 15.00 mL deionized distilled water at room temperature, only 0.850 grams of the compound was dissolved. The temperature of the heterogenous mixture was decreased by 1.70K.Prior to this, the calorimeter was calibrated using a 15mL aqueous reaction mixture that initially contains 0.070 moles each of HBr and KOH. The recorded ΔT is +5.75K. Note: H+(aq) + OH -(aq) → H2O(l) ΔH = -55.85 kJ/molAB(s) ⇌ A+(aq) + B-(aq) ΔH = 88.75 kJ/molspecific heat (H2O) = 4.184 J/g°CMM of AB = 65 g/mol What is the specific heat of solid AB compound (in J/g°C)?