- 400 -600 CH4(g) +20₂(g) → CO₂(g) + 2H₂O(L) AHxn--900 kJ/mol AH, H₂O(L) ~ -300 kJ/mol AH, CO₂(g) = -400 kJ/mol f What is the standard heat of formation of methane, AH°f CH4(g), as calculated from the data above? A) -200 kJ/mole B) -100 kJ/mole C)+100 kJ/mole D) +200 kJ/mole

- 400 -600 CH4(g) +20₂(g) → CO₂(g) + 2H₂O(L) AHxn--900 kJ/mol AH, H₂O(L) ~ -300 kJ/mol AH, CO₂(g) = -400 kJ/mol f What is the standard heat of formation of methane, AH°f CH4(g), as calculated from the data above? A) -200 kJ/mole B) -100 kJ/mole C)+100 kJ/mole D) +200 kJ/mole

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

The standard enthalpies of formation, at 25.00\deg C, of methane (CH4(g)), water (H2O(!), and carbon dioxide (CO2(g)) are, respectively, -74.6 kJ/mol, -285.8 kJ/mol, and -393.5 kJ/mol. What quantity of heat is released (in kJ) during the combustion of 18.20 L of methane under a constant pressure of 1.000 atm at 25.00\deg C (N.B., combustion is the reaction of a substance with molecular oxygen to produce water and carbon dioxide)?
7. The heat evolved from the combustion of 0.94g ethanol raises the temperature of 250 cm³ water contained in a copper beaker by 20.0 °C. [Specific heat capacity of solution = 4.18 Jg1 °C; density of solution = 1.0 g cm-3] i) What is the enthalpy of combustion per mol of ethanol? ii) Calculate the temperature rise when 1.50 g ethanol is used to heat 500 cm3 water in the same copper beaker.
When ammonia reacts with dinitrogen oxide gas (ΔHf° = 82.05 kJ/mol), liquid water and nitrogen gas are formed. How much heat is liberated or absorbed by the reaction that produces 365 mL of nitrogen gas at 25°C and 743 mm Hg? (in kJ) ΔHf° (kJ/mol) NH3(g) –46.1 H2O(l) –285.8 N2(g) 0 N2O(g) 82.05
A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300.g of water (see sketch at right). First, a 6.000g tablet of benzoic acid C6H5CO2H is put into the "bomb" and burned completely in an excess of oxygen. (Benzoic acid is known to have a heat of combustion of /26.454kJg .) The temperature of the water is observed to rise from 14.00°C to 39.98°C over a time of 14.9 minutes. Next, 5.570g of acetylene C2H2 are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 14.00°C to 60.18°C . Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: A "bomb" calorimeter. →+2C2H2g 5O2g + 4CO2g 2H2Og Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits. Note for advanced students:…
The value of AH° for the reaction below is 128.1 kJ CH,OH -Co, + 2H (1) 2(g) 2(g) How may kJ of heat are consumed when 10.1 g of H2(g) is formed as shown in the equation? Given that the atomic mass of C = 12.01 g/mol, H = 1.008 g/mol, O = 16.00 g/mol Show your answers in TWO (2) decimal places. Do not include the units in your final answers.
The oxidation of glucose, C6H12O6(s), is described by the following thermochemical equation:C6H12O6(s) + 6 O2(g) → 6 CO2(g) + 6 H2O(l) ΔH = -2772 kJHow much heat, in kilojoules, can be produced by the oxidation of 3.56 g of fuel C6H12O6?Molar mass of C6H12O6 = 180.156 g/mol
The overall reaction in a commercial heat pack can be repre- sented as 4Fe(s) + 30₂(g) 2Fe₂O3(s) AH = -1652 kJ d. How much heat is released when 10.0 g Fe and 2.00 g O₂ are reacted?
4) Consider the thermochemical equation below. What mass of HgO must decompose to consume 400.0 kJ of heat? 2 HgO (s) → 2 Hg (1)+ O2(g) AH°rxn =+ 181.4 kJ (1) 5) Write the standard formation reaction for KAI(SO4)2(s). (1) 3 CO2 (g). (1) -393.5 kJ/mol 2 Cr (s) + 3 CO (ag) -110.5 kJ/mol Cr2O3 (s) 6) Consider the reaction 0.0 kJ/mol AH°f = -1139.7 kJ/mol Calculate AH°rxn.
For the reactionCO(g) + Cl2(g) COCl2(g)G° = -62.9 kJ and S° = -137.3 J/K at 331 K and 1 atm.This reaction is (reactant, product) fill in the blank 1 favored under standard conditions at 331 K.The standard enthalpy change for the reaction of 2.37 moles of CO(g) at this temperature would be kJ.
10. The following molar enthalpies of formation are given in kJ/mol: AHP[C;Hs(g)] = -104; AHP[CO2(g)] = -394; AHP[H;O(g)] = -242. (a) Calculate the molar heat of combustion of propane (C;Hs) according to the following equation: C;Hs(g) + 5 O2(g) → 3CO2(g) + 4H2O(g); (b) How many grams of propane gas must be combusted to provide enough thermal energy to heat 1.00 kg water from 22.0°C to 100.0°C? (Specific heat of water = 4.184 J/mol.K)
4. What mass of propane must be burned to supply 700. kJ as heat? The thermochemical equation for the combustion of propane is: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4H₂O(1) AH°-2220. kJ