CHEMISTRY:STRUCTURE+PROPERTIES-ACCESS
CHEMISTRY:STRUCTURE+PROPERTIES-ACCESS
15th Edition
ISBN: 9780321982780
Author: Tro
Publisher: PEARSON
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Textbook Question
Chapter 16, Problem 1SAQ

What is the correct expression for the equilibrium constant (Kc) for the reaction between carbon and hydrogen gas to form methane shown here?

C ( s ) + 2 H 2 ( g ) C H 4 ( g )

  • K c = [ CH 4 ] [ H 2 ]  
  • K c = [ CH 4 ] [ C ] [ H 2 ]  
  • K c = [ CH 4 ] [ H 2 ] 2  
  • K c = [ CH 4 ] [ C ] [ H 2 ] 2  

Expert Solution & Answer
Check Mark
Interpretation Introduction

Interpretation: What is the correct expression for the equilibrium constant (Kc) for the reaction.

Concept introduction: For the reaction type:

  xA+yBmC+nD

where A, B, C and D represent chemical species and x, y, m and n are coefficients of the balanced chemical equation. The equilibrium constant for such reactions are given as:

  Ka=[C]m[D]n[A]x[B]y

The square brackets represent concentration of the species in equilibrium.

Correct answer:

Correct answer is option (c).

Explanation of Solution

Reason for correct option:

  Ka=[C]m[D]n[A]x[B]y

Substitute the values in the equilibrium constant equation for the law of mass action and calculate the equilibrium constant (Kc) for the reaction between carbon and hydrogen gas to from the equilibrium methane C(s) + 2H2 (g) CH4(g) the concentration of elements in the solid is taken to be zero.

Ka= [C]m [D]n [A]x [B]y=[ CH 4] [ H 2]2

Therefore, the correct answer is option (c).

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Chapter 16 Solutions

CHEMISTRY:STRUCTURE+PROPERTIES-ACCESS

Ch. 16 - What is the effect of adding helium gas (at...Ch. 16 - Prob. 12SAQCh. 16 - How does a developing fetus get oxygen in the...Ch. 16 - What is dynamic equilibrium? Why is it called...Ch. 16 - Give the general expression for the equilibrium...Ch. 16 - What is the significance of the equilibrium...Ch. 16 - What happens to the value of the equilibrium...Ch. 16 - If two reactions sum to an overall reaction, and...Ch. 16 - Explain the difference between Kcand Kp. 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CO(g)+2H2(g)CH3OH(g) A...Ch. 16 - Consider the reaction: NH4HS(s)NH3(g)+H2S(g) At a...Ch. 16 - Consider the reaction:...Ch. 16 - Silver sulfate dissolves in water according to the...Ch. 16 - Nitrogen dioxide reacts with itself according to...Ch. 16 - Consider the reaction and the associated...Ch. 16 - Consider the reaction and the associated...Ch. 16 - For the reaction Kc= 0.513 at 500K. 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