If the overall spontaneous reaction is Fe3+ (aq) + Cr(s) Cr2 (aq), which of the
ID: 868168 • Letter: I
Question
If the overall spontaneous reaction is Fe3+ (aq) + Cr(s) Cr2 (aq), which of the following statement is TRUE? At a given set of temperature and pressure conditions, the reaction below has a delta G = -376 kj but the reaction does not appear to proceed at those conditions. Which of the following is the best explanation for this occurrence? A reaction has a delta H cxn = + 54.2 kj. Calculate the entropy change for the surrounding (delta S surr) for the reaction at 25 degree C (Assume constant pressure and temperature).Explanation / Answer
In the given cell, Fe electrode is cathode and is deposited.
Fe2+(aq) + 2e- ------------> Fe(s)
Therefore , negative charge increases in Iron electrode compartment. To neutral this excess negative charge, K+ ions move towards Iron electrode.
Answer is option (C).