CAIE A-Level Chemistry A2 23.4.4 Temperature Effect on Feasibility Topic Practice

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Question 1

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Some electrode potentials are shown in Table 3.1.

Table 3.1

Table 3.1

Iron(II) chloride, FeCl2\mathrm{FeCl}_{2}, is oxidised by chlorine to form iron(III) chloride, FeCl3\mathrm{FeCl}_{3}, under standard conditions.

2FeCl2( s)+Cl2( g)→2FeCl3( s)2 \mathrm{FeCl}_{2}(\mathrm{~s})+\mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{FeCl}_{3}(\mathrm{~s})
ΔH⊖=−128 kJ mol−1\Delta H^{\ominus}=-128 \mathrm{~kJ} \mathrm{~mol}^{-1}
Table 3.2

Table 3.2

Predict whether this reaction becomes more or less feasible at a higher temperature.

Explain your answer.
The reaction becomes feasible.
explanation

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