For the gaseous reaction , at . If instantaneous partial pressures are , , and , which of the following is/are correct?

Question

For the gaseous reaction $X(g) + Y(g) ightleftharpoons Z(g)$, $K_p = 0.5	ext{ atm}^{-1}$ at $400	ext{ K}$. If instantaneous partial pressures are $P_X = 2	ext{ atm}$, $P_Y = 2	ext{ atm}$, and $P_Z = 4	ext{ atm}$, which of the following is/are correct?

Prashant Kotian · Accepted Answer

Correct answer: A,B,C,D. (A). Since , the reaction moves backward (B). Moving backward consumes , so decreases (C). The backward reaction produces 2 moles of gas () for every 1 mole of consumed, so the total number of gaseous moles, and hence total pressure, will increase at constant volume (D).

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