K for Gases
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K for Gases
When a question asks you to find K for a reaction that involves gases and it doesn't specify whether to find Kc or Kp, should you just find Kp? Or should you put down both Kc and Kp?
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Re: K for Gases
For gases you should use Kp, because gases would have a "concentration" in the same way as aqueous solutions, as there is not really a solvent. Instead, the equivalent of concentration for a gas would be its partial pressure.
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Re: K for Gases
Dina 2k wrote:Can someone explain 5H.1?
5H.1 is similar to the example shown on page 410 of the textbook, so you can follow that when trying to do this homework problem. In fact, part (a) is almost the same as the example. With the reverse reaction, the equilibrium constant is the reciprocal of the original chemical equation, so it would be 1/(equilibrium constant from original equation).
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Re: K for Gases
It probably depends on what you are given in the problem (the partial pressures or the concentrations). You could do either Kp or Kc, as long as you keep track and do not confuse the two because the values will not be the same. And in Wednesday's lecture Lavelle showed us how to convert between Kp and Kc, so either is probably okay.
Re: K for Gases
preyasikumar_2L wrote:It probably depends on what you are given in the problem (the partial pressures or the concentrations). You could do either Kp or Kc, as long as you keep track and do not confuse the two because the values will not be the same. And in Wednesday's lecture Lavelle showed us how to convert between Kp and Kc, so either is probably okay.
Hello,
Could you explain how to convert between Kp and Kc? Thank you!
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Re: K for Gases
DHavo_1E wrote:preyasikumar_2L wrote:It probably depends on what you are given in the problem (the partial pressures or the concentrations). You could do either Kp or Kc, as long as you keep track and do not confuse the two because the values will not be the same. And in Wednesday's lecture Lavelle showed us how to convert between Kp and Kc, so either is probably okay.
Hello,
Could you explain how to convert between Kp and Kc? Thank you!
Kp = Kc(RT)delta n
(R is the 0.08206 Latm/molK constant, T is temperature in Kelvin, delta n is change in moles of gas (gas ONLY) ((products-reactants)) )
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Re: K for Gases
Find Kp, because the pressure that a gas exerts is used to represent its concentration.
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Re: K for Gases
You would use Kp because you would use pressure to find the equilibrium constant of gases.
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Re: K for Gases
preyasikumar_2L wrote:DHavo_1E wrote:preyasikumar_2L wrote:It probably depends on what you are given in the problem (the partial pressures or the concentrations). You could do either Kp or Kc, as long as you keep track and do not confuse the two because the values will not be the same. And in Wednesday's lecture Lavelle showed us how to convert between Kp and Kc, so either is probably okay.
Hello,
Could you explain how to convert between Kp and Kc? Thank you!
Kp = Kc(RT)delta n
(R is the 0.08206 Latm/molK constant, T is temperature in Kelvin, delta n is change in moles of gas (gas ONLY) ((products-reactants)) )
Do we need to know how to convert between Kp and Kc?
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