Miscellaneous calculation with moles, mass and gas volume

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Discussion Overview

The discussion revolves around a problem involving the calculation of moles, mass, and gas volume in a chemical reaction between acetylene and oxygen. Participants explore how to determine the limiting reactant and the resulting products from the reaction, as well as the conditions post-reaction, including partial pressures at a specified temperature.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • One participant requests guidance on how to approach the problem, specifically seeking methods for calculating the number of moles and the final answer.
  • Another participant suggests determining the number of moles of each gas and questions whether the mixture is stoichiometric or rich in either acetylene or oxygen, indicating that the limiting reactant will dictate the amount of reaction products.
  • Several participants recommend using the general gas equation to find the number of moles and identify the limiting reactant, but there is confusion regarding the specific outcomes expected from the calculations.
  • A participant clarifies their goal of finding the reactant amounts as shown in the chemical equation and the partial pressures of the gases after the reaction at the specified temperature.

Areas of Agreement / Disagreement

There is no consensus on the specific methods to be used or the exact outcomes expected from the calculations. Participants express varying levels of understanding and clarity regarding the problem's requirements.

Contextual Notes

Participants have not fully resolved the assumptions regarding the stoichiometry of the gas mixture or the implications of the reaction conditions on the calculations.

pavadrin
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Here is the problem:
An oxy-acetylene gas mixture contains 1.05l of acetylene (C2H2) and 2.6L of oxygen both measured at 102 kPa and 298 K. The mixture is contained in a sealed bottle of 5.5L volume. Determine the reacted as shown here ( 2C2H2(g) +5O2(g)  4CO2(g) + 2H2O(g) ) and the temperature is 851°C.
I don’t have the slightest idea on how to approach this problem, so any posts suggesting the method of approach (or the final answer and working so I can follow :biggrin: ) would be greatly appreciated.
Thanks
Pavadrin
 
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Determine the number of moles of each gas. Chemical reactions occur on a molecular basis and the mole is proportional to the number of molecules.

Is the mixture stoichiometric or rich in either acetylene or oxygen? The lesser of the two (lower number of moles) would limit the amount of reaction products.
 
Use the general gas equation to find the number of moles of each reactant. Find out the limiting reactant.

pavadrin said:
Determine the reacted as shown here ( 2C2H2(g) +5O2(g)  4CO2(g) + 2H2O(g) )

What's that supposed to mean? Also, what are you actually supposed to find out?
 
ultima9999 said:
Use the general gas equation to find the number of moles of each reactant. Find out the limiting reactant.



What's that supposed to mean? Also, what are you actually supposed to find out?
That question mark is supposed to be an arrow, sorry. I am trying to find out the reactant shown in the equation, and the partial pressure of each of the gas/es after the reaction has occur at the stated temperature.
Thanks
Pavadrin
 

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