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This question is about hydrogen as a fuel Carbon dioxide emissions from fossil fuels are a major H2 factor in climate change. Hydrogen is a potential alternative to fossil fuels, providing 'clean energy' with only water as a byproduct. The UK government is investigating converting the natural gas grid to carry hydrogen instead. Thermochemistry: (a) For this question, assume all processes take place at 298 K. Enthalpy change of formation of CH4(g), AH = -74.8 kJ mol-1 Enthalpy change of formation of CO2(g), AH= -393.5 kJ mol-1 Enthalpy change of formation of H2O(I), AH = -285.8 kJ mol-1 One low cost method for producing hydrogen is represented by the overall reaction: CHa(8) + 2H+O(I) → CO2(g) + 4H2(g) . Calculate the enthalpy change for this reaction. Oxidation reduction (b) Electrolysis of water is another method of producing hydrogen, as represented in the following reaction: H20(1) → H2(8) + O2(g) (i) Which element is oxidized and which element is reduced? (ii) Balance the redox equation using method of change in oxidation states. Gas laws: (c) (i) During electrolysis of water, 5.34 moles of H2 is produced at 25°C and occupied a volume of 1.5 L. calculate the H2 gas pressure. (iii) What will be the pressure of the gas if the temperature increases to 50 °C. Atomic structure: (d) What is the type of intermolecular bonding in the following molecules? i) H2 (8) ii) H2O (I) (e) Write the electron configuration of sulfur 16S

This question is about hydrogen as a fuel Carbon dioxide emissions from fossil fuels are a major H2 factor in climate change. Hydrogen is a potential alternative to fossil fuels, providing 'clean energy' with only water as a byproduct. The UK government is investigating converting the natural gas grid to carry hydrogen instead. Thermochemistry: (a) For this question, assume all processes take place at 298 K. Enthalpy change of formation of CH4(g), AH = -74.8 kJ mol-1 Enthalpy change of formation of CO2(g), AH= -393.5 kJ mol-1 Enthalpy change of formation of H2O(I), AH = -285.8 kJ mol-1 One low cost method for producing hydrogen is represented by the overall reaction: CHa(8) + 2H+O(I) → CO2(g) + 4H2(g) . Calculate the enthalpy change for this reaction. Oxidation reduction (b) Electrolysis of water is another method of producing hydrogen, as represented in the following reaction: H20(1) → H2(8) + O2(g) (i) Which element is oxidized and which element is reduced? (ii) Balance the redox equation using method of change in oxidation states. Gas laws: (c) (i) During electrolysis of water, 5.34 moles of H2 is produced at 25°C and occupied a volume of 1.5 L. calculate the H2 gas pressure. (iii) What will be the pressure of the gas if the temperature increases to 50 °C. Atomic structure: (d) What is the type of intermolecular bonding in the following molecules? i) H2 (8) ii) H2O (I) (e) Write the electron configuration of sulfur 16S

Chemistry for Engineering Students
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 9.101PAE
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This question is about hydrogen as a fuel Carbon dioxide emissions from fossil fuels are a major factor in climate change. Hydrogen is a potential alternative to fossil fuels, providing 'clean energy' with only water as a byproduct. The UK government is investigating converting the natural gas grid to carry hydrogen instead. H2 Thermochemistry: (a) For this question, assume all processes take place at 298 K. Enthalpy change of formation of CH4(g), AH = -74.8 kJ mol-1 Enthalpy change of formation of CO2(g), AH= -393.5 kJ mol-1 Enthalpy change of formation of H20(1), AH = -285.8 kJ mol-1 One low cost method for producing hydrogen is represented by the overall reaction: CHa(g) + 2H+O(1) → CO2(8) + 4H2(g) . Calculate the enthalpy change for this reaction. Oxidation reduction (b) Electrolysis of water is another method of producing hydrogen, as represented in the following reaction: H20(1) → Hz((8) + O2(8) (i) Which element is oxidized and which element is reduced? (ii) Balance the redox equation using method of change in oxidation states. Gas laws: (c) (i) During electrolysis of water, 5.34 moles of H2 is produced at 25°C and occupied a volume of 1.5 L. calculate the H2 gas pressure. (iii) What will be the pressure of the gas if the temperature increases to 50 °C. Atomic structure: (d) What is the type of intermolecular bonding in the following molecules? i) H2 (8) ii) H20 (I) (e) Write the electron configuration of sulfur 16S
Transcribed Image Text:This question is about hydrogen as a fuel Carbon dioxide emissions from fossil fuels are a major factor in climate change. Hydrogen is a potential alternative to fossil fuels, providing 'clean energy' with only water as a byproduct. The UK government is investigating converting the natural gas grid to carry hydrogen instead. H2 Thermochemistry: (a) For this question, assume all processes take place at 298 K. Enthalpy change of formation of CH4(g), AH = -74.8 kJ mol-1 Enthalpy change of formation of CO2(g), AH= -393.5 kJ mol-1 Enthalpy change of formation of H20(1), AH = -285.8 kJ mol-1 One low cost method for producing hydrogen is represented by the overall reaction: CHa(g) + 2H+O(1) → CO2(8) + 4H2(g) . Calculate the enthalpy change for this reaction. Oxidation reduction (b) Electrolysis of water is another method of producing hydrogen, as represented in the following reaction: H20(1) → Hz((8) + O2(8) (i) Which element is oxidized and which element is reduced? (ii) Balance the redox equation using method of change in oxidation states. Gas laws: (c) (i) During electrolysis of water, 5.34 moles of H2 is produced at 25°C and occupied a volume of 1.5 L. calculate the H2 gas pressure. (iii) What will be the pressure of the gas if the temperature increases to 50 °C. Atomic structure: (d) What is the type of intermolecular bonding in the following molecules? i) H2 (8) ii) H20 (I) (e) Write the electron configuration of sulfur 16S
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