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CGP EDU Academic Team
Published on: August 12, 2026
For the process, H 2 O( λ ) ⎯→ H 2 O(g) at T = 100 ° C and 1 atmosphere pressure, the correct choice is :
Text Solution
Verified by ExpertsThe correct answer is:
B
For H 2 O( λ ) ⎯→ H 2 O(g) at T = 100ºC, 1atm
equilibrium exists. ∴ Δ G = 0, Δ H – T Δ S = 0
Δ H = T Δ S > 0 for system, since evaporation is endothermic
∴ ( Δ S) system > 0, also ( Δ S) surrounding = 
Heat gained by system = heat lost by surroundings
∴ q surr. < 0 ∴ ( Δ S) surr. < 0
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