ΔS for 4Fe_(s)+3O_2(g)→2Fe₂O_3(s) is – 550 J/mol/K.
The process is found to be spontaneous even at 298K because [ Δ H = –1650 kJ]

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

ΔS_total = + 1650J

ΔS_total = – 2000J

ΔS_total = – 4987J

ΔS_total = + 4987J

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

For Irreversible spontaneous process , $\Delta S_{system}+\Delta S_{Surroundings}>0$

ΔS_sys = -550J

$\begin{array}{l} \Delta {S_{Surr.}} = \frac{{ - (\Delta {H_{sys}})}}{T}\\\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{ - ( - 1650 \times 1000)}}{{298}}\\\\ \,\,\,\,\,\,\,\,\,\,\,\,\, = 5537J \end{array}$

$\therefore \Delta S_{total}=-550+5537=4987J$

Watch 3-min video & get full concept clarity

hear from our champions

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

🔥 Start Your JEE/NEET Prep at Just ₹1999 / month - Limited Offer! Check Now!

Get Expert Academic Guidance – Connect with a Counselor Today!