iran-konkur 2017 Q216

iran-konkur · Other · konkur-riazi_1396_specialized Not Maths
216- If 0.1 mol of $A_2(s)$ reacts with 1 mol of $X_2(s)$, according to the reaction: $$A_2(s) + X_2(s) \rightarrow 2AX(g),\quad \Delta E = -100\ \text{kJ},\quad \Delta H = -90\ \text{kJ}$$ When the reaction goes to completion, the approximate value of $\Delta V$ at a pressure of 1 atm at the end of the reaction and at the moment of return to the initial temperature, at STP conditions, how many liters to the left will it be?
$(1\text{atm} \approx 10^5\ \text{Pa})$
(1) $4.48 \cdot 10$ (2) $2.24 \cdot 10$ (3) $4.48 \cdot 100$ (4) $2.24 \cdot 100$
Calculation Space
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\textbf{216-} If 0.1 mol of $A_2(s)$ reacts with 1 mol of $X_2(s)$, according to the reaction:
$$A_2(s) + X_2(s) \rightarrow 2AX(g),\quad \Delta E = -100\ \text{kJ},\quad \Delta H = -90\ \text{kJ}$$
When the reaction goes to completion, the approximate value of $\Delta V$ at a pressure of 1 atm at the end of the reaction and at the moment of return to the initial temperature, at STP conditions, how many liters to the left will it be?

$(1\text{atm} \approx 10^5\ \text{Pa})$

(1) $4.48 \cdot 10$ \hfill (2) $2.24 \cdot 10$ \hfill (3) $4.48 \cdot 100$ \hfill (4) $2.24 \cdot 100$

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