+2 3H₂2₂)= Exercise 4. In the hydrogen economy, the production of H₂ is based on solar energy and the hydrogen - gas can then be used as fuel: gi 67het 572 2H₂(g) + O₂(g) -> 2 H₂O (1) 34.30:57 15/mal An important advantage of hydrogen as a fuel is that it does not cause pollution. A major disadvantage, however, is that it is a gas and is therefore much more difficult to store than a liquid or solid. Calculate the required volume of hydrogen gas at 25°C and 1 atm to provide as much energy as the combustion of 1 liter octane (C8H18). The density of octane is 0.7 kg/l and AH = -249.9 kJ/mol. [2659 liter]

+2 3H₂2₂)= Exercise 4. In the hydrogen economy, the production of H₂ is based on solar energy and the hydrogen - gas can then be used as fuel: gi 67het 572 2H₂(g) + O₂(g) -> 2 H₂O (1) 34.30:57 15/mal An important advantage of hydrogen as a fuel is that it does not cause pollution. A major disadvantage, however, is that it is a gas and is therefore much more difficult to store than a liquid or solid. Calculate the required volume of hydrogen gas at 25°C and 1 atm to provide as much energy as the combustion of 1 liter octane (C8H18). The density of octane is 0.7 kg/l and AH = -249.9 kJ/mol. [2659 liter]

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

Acetylene torches are used for welding. These torches use a mudure of acetylene gan, CH₂, and oxygen gas, O, to produce the following combustion reaction 2C₂H₂(g) +50; (g)-+4CO(g) + 2H₂O(g) Part A Imagine that you have a 5.50 1, gas tark and a 2.00 1 gas tank You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch if you fill the larger tank with oxygen to a pressure of 155 atan, to what pressure should you till the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases Express your answer with the appropriate units ▸View Available Hint(s) P Value Submit atm ? X Incorrect Try Again: 5 attempts remaining
5. Sodium bicarbonate (NaHCO3) is used to neutralize acids to form sodium chloride, a salt, carbon dioxide gas, and water. Normally sodium bicarbonate is added until the fizzing ceases, at which point no more CO2 (g) is produced. NaHCO3 (s) + HCl (aq) NaCl (aq) + CO2 (g) + H2O (1) If 150. mL of 3.0 M HCl is spilled on a lab bench, what is the minimum mass of sodium bicarbonate that must be used to neutralize the acid?
Can this be solved with work, please? thank you!
The metal widely used in our civilization is iron (Fe) and it is obtained industrially by the reduction of iron oxide (Fe,0,) with carbon at higher temperatures (over 1000 °C). The equation for the reaction is as follows, Fe,0;(s) + C(s) –Fe(s) + CO2(g) Using the above equation, a. What is the number of moles of Fe? (ensure 3 decimal places for e.g. 0.300) mols b. How much of the product (Fe) can be produced from 10.0g of Fe,O;?(ensure 2 decimal places for e.g. 0.30) c. What is the number of moles for carbon?(ensure only 4 decimal places) (ensure 4 decimal places for e.g. 0.3003) mols bo
The Apollo 13 mission astronauts are running out of oxygen and need to get rid of the excess carbon dioxide. You know that sodium hydroxide can remove carbon dioxide from the spacecraft cabin. The filter which they had been using is fully saturated and no longer works. The astronauts have a 5 kg container of sodium hydroxide on the ship. The reaction to neutralize the air, remove carbon dioxide with sodium hydroxide is shown below CO2(g) + 2NaOH(s) ⟶⟶ Na2CO3(aq) + H2O(l) The astronauts have 2 days left before they land on earth. You know that there are three astronauts, and each astronaut emits roughly 500. g of carbon dioxide each day. Is there enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon dioxide, or are the astronauts doomed? Calculate how much sodium hydroxide is required to remove all the carbon dioxide from the three astronauts. Be sure to show all your work!
Consider the reaction. heat 2 Al(s) + Fe,0,(s) Al, 0,(s) + 2 Fe(1) If 10.7 kg Al reacts with an excess of Fe, O3, how many kilograms of Al,O, will be produced? mass of Al, O, produced: kg * TOOLS x10
9. One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(III) hydroxide from a solution containing rhodium(III) sulfate according to the following chemical equation: (Be sure to balance the reaction equation) Rh₂(SO4)3(aq) + NaOH(aq) - Rh(OH)³(s) + Na₂SO4(aq) If 69.28 g of rhodium(III) hydroxide is to be produced, what mass of rhodium(III) sulfate will be needed for the reaction?
6. Write the expression for Kc for the following reactions. In each case indicate whether the reaction is homogeneous or heterogeneous. a. CH4 (g) + H2S (g) → CS2(g) + H2 (g) HF + F¯ (aq) b. (aq) ⇒ H* (aq) c. Ti (s) + Cl2 (g) → TiCl4 (1) d. HCI (aq) + O2 (g) → H₂O (1) + 2 Cl2 (g)
Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be synthesized using a two-step thermal process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: P4(1)+5 0,(g) 2 P,05(g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid: P,0,(g)+3 H,O(1)→2 H,PO,(1) Write the net chemical equation for the production of phosphoric acid from phosphorus, oxygen and water. Be sure your equation is balanced.
||| O Microsoft O The useful metal manganese can be extracted from the mineral rhodochrosite by a two-step process. In the first step, manganese(II) carbonate and oxygen react to form manganese(IV) oxide and carbon dioxide: 2MnCO3(s) + O₂(g) 2MnO₂ (s) + 2 CO₂(g) W O CHEMICAL REACTIONS Reaction sequence stoichiometry In the second step, manganese (IV) oxide and aluminum react to form manganese and aluminum oxidide: 3 MnO₂ (s) + 4A1(s)→ 3Mn(s) + 2 Al₂O₂ (s) Microsoft esc Suppose the yield of the first step is 73.% and the yield of the second step is 86.%. Calculate the mass of manganese(II) carbonate required to make 1.0 kg of manganese. Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits. G Microsoft 6.52.210... Explanation B ! Check 9,270 280 103 x10 HE X OCT 24 ロ・ロ Ś III E % LC ustv ♫ 6 2 & 7 9 © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility DZA 8 9 1/5 W 0 30 Simrat V + 11 ? olo Ar 2…
The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(II) oxide (HgO) into liquid mercury and gaseous dioxygen. 2. Suppose 71.0 mL of dioxygen gas are produced by this reaction, at a temperature of 50.0 °C and pressure of exactly 1 atm. Calculate the mass of mercury(II) oxide that must have reacted. Be sure your answer has the correct number of significant digits.
Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be synthesized using a two-step thermal process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: P4(1)+50₂(9) 2 P₂05(9) In the second step, diphosphorus pentoxide and water react to form phosphoric acid: P₂O(g) + 3 H₂O(1)-2H₂PO4(1) ob Write the net chemical equation for the production of phosphoric acid from phosphorus, oxygen and water. Be sure your equation is balanced. XS 2