If the enthalpy change for the transition of liquid water to steam

If The Enthalpy Change For The Transition Of Liquid Water Chemistry QuestionIf The Enthalpy Change For The Transition Of Liquid Water Chemistry Question

If the enthalpy change for the transition of liquid water to steam is 30 kJ mol⁻¹ at 27⁰C, the entropy change for the process would be

Options

(a) 10 J mol⁻¹ K⁻¹
(b) 1.0 J mol⁻¹ K⁻¹
(c) 0.1 J mol⁻¹ K⁻¹
(d) 100 J mol⁻¹ K⁻¹

Correct Answer:

100 J mol⁻¹ K⁻¹

Explanation:

We know that ΔG = ΔH – TΔS,
0 = ΔH -TΔS [ThereforeΔG=0],
ΔS = ΔH/T = 30 x 10³ / 300 = 100 J mol⁻¹ K⁻¹.

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