UPSC Combined Geo-Scientist, Mains · 2017 · Mains Paper II
Q3. Thermodynamics of vaporization
Question
18.0 g water vaporizes at 1 bar and 373 K. Calculate q,w,ΔU,ΔH,ΔS,ΔA and ΔG in SI units. Latent heat is 540 cal g⁻¹.
Answer in brief
q=ΔH=40.67 kJ; w=-3.10 kJ; ΔU=37.57 kJ; ΔS=109.0 J K⁻¹; ΔA=-3.10 kJ and ΔG≈0.
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CoversThermodynamics of vaporizationPhase transitions