Q.

For the reaction I2(g)I2(s);ΔH=veThen
choose the correct statement/s from the following.
a) The process is spontaneous at all temperatures
b) The process is accompained by an increase entropy
c) The process is accompained by a decrease in entropy
d) The process is accompained by a decrease in enthalpy
The correct statements are

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a

Only b and d

b

Only a, b and c

c

Only a, c and d

d

Only c and d

answer is C.

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Detailed Solution

I2(g) is converted into I2(s). Entropy decreases.

H=-ve; enthalpy decreases

S decreases and His also decreasing, it is spontaneous if H > TS. This is possible only at low temperatures.

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