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For the reaction, \( \mathrm{CH}_{4}(\mathrm{~g})+2 \mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{CO}_{2}(\mathrm{~g})+ \)
\( \mathrm{P} \)
\[
2 \mathrm{H}_{2} \mathrm{O}(l), \Delta_{\mathrm{r}} \mathrm{H}=-170.8 \mathrm{~kJ} \mathrm{~mol}^{-1}
\]
W.
Which of the following statement is not true?
(1) At equilibrium, the concentrations of \( \mathrm{CO}_{2}(\mathrm{~g}) \) and \( \mathrm{H}_{2} \mathrm{O}(l) \) are not equal
(2) The equilibrium constant for the reaction is given by \( \mathrm{K}_{\mathrm{P}}=\frac{\left[\mathrm{CO}_{2}\right]}{\left[\mathrm{CH}_{4}\right]\left[\mathrm{O}_{2}\right]} \)
(3) Addition of \( \mathrm{CH}_{4}(\mathrm{~g}) \) and \( \mathrm{O}_{2}(\mathrm{~g}) \) at equilibrium will cause a shift to the right
(4) The reaction is exothermic


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