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For the reaction C H 4 ( g ) + 2 O 2 ( g ) ⇌ C O 2 ( g ) + 2 H 2 O ( l ) Δ H r = - 170.8 k J m o l - 1 . Which of the following statements is not true?

Options

  1. AThe reaction is exothermic
  2. BAt equilibrium the concentrations of C O 2 ( g ) and H 2 O ( l ) are not equal
  3. CThe equilibrium constant for the reaction is given by K P = P CO 2 P CH 4 × P O 2
  4. DAddition of C H 4 ( g ) or O 2 ( g ) at equilibrium will cause a shift to the right.

Correct answer

C. The equilibrium constant for the reaction is given by K P = P CO 2 P CH 4 × P O 2

Step-by-step solution

C H 4 ( g ) + 2 O 2 ( g ) ⇌ C O 2 ( g ) + 2 H 2 O ( l ) K P = P C O 2 P C H 4 . P O 2 2

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