Chemical Thermodynamics Question 25
Question: For which of the processes is $ \Delta S $ negative [Pb. PMT 1998]
Options:
A) $ H_2(g)\to 2H(g) $
B) $ N_2(g),1atm\to N_2(g),8,atm $
C) $ 2SO_3(g)\to 2SO_2(g)+O_2(g) $
D) $ {C_{(diamond)}}\to {C_{(graphite)}} $
Show Answer
Answer:
Correct Answer: B
Solution:
Processes A and C take place with the increase of no. of moles of gaseous species and hence the disorder or entropy increases. B on increasing pressure, disorder or randomness decreases and so also the entropy D is endothermic process and $ \Delta S $ is positive.
