16. When 1 mole of the fossil fuel methane gas (CHa) is burned at constant press

Question

16. When 1 mole of the fossil fuel methane gas (CHa) is burned at constant pressure, 890 kJ of energy is released as heat. a. (3 pts) Write the balanced chemical equation for the combustion of methane that includes the energy released b.(4pts) Calculate heat generated for a process in which a 5.8 g sample of methane is burned at a constant pressure. Answer c. (2 pts) Is this reaction endothermic or exothermic? d. (2 pts) What are the pros for using hydrogen as a clean burning fuel compared to CHs?

Explanation / Answer

c. the given reaction is combustion recation and generally all combustion reactions are exothermic where heat is generated and form the themodynamic data if enthalpy H is negitive the process must be exothermic and spontaneous.

d. methane as fuel can emits lot of green house gases like co2 and co to the atmosphere which can cause global warming.where as hydrogen is rich source of energy for many reasons, some of them are

1.it is renewable energy source and abaundant supply in nature

2.hydrogen enrgy is non toxix

3. hydrogen as fuel is clean practically( electrolysis).

4. far efficicent tahn other sources of energies( like coal, petroleum)

5. producing hydrogen fuel is economic than conventional fuels

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