Exams › NEET › Chemistry

When liquid water transitions to water vapor at 1 atm pressure, which of the following statements is accurate?

1. The enthalpy change (ΔH) equals 40630 J mol^-1.
2. The entropy change (ΔS) is 108.8 J K^-1 mol^-1.
3. The Gibbs free energy change (ΔG) is determined by ΔH - TΔS.
4. At equilibrium, when ΔG equals zero, ΔH - TΔS also equals zero.

Correct answer: At equilibrium, when ΔG equals zero, ΔH - TΔS also equals zero.

Solution

Option D is correct because when ΔG = 0, the system is at equilibrium, and the relationship ΔH - TΔS = 0 holds true.

Related NEET Chemistry questions

• An ideal gas is compressed in a closed container its U?
• Internal energy does not include
• Assertion The change in internal energy and change in heat enthalpy does not depend upon the path by which changes are brought in. Reason Both \( \Delta U \) and \( \Delta H \) are path independent as U and H are state functions.
• Liquid benzene burns in oxygen according to: \( 2 C_{6} H_{6}+15 O_{2} \rightarrow 12 C O_{2}+6 H_{2} O \) If density of liquid benzene is \( 0.88 \mathrm{g} / \mathrm{cc} \) what volume of \( \boldsymbol{O}_{2} \) at \( \mathrm{STP} \) is needed to complete the combustion of 39 cc of liquid benzene?
• When a bomb calorimeter is used to determine the heat of reaction, which property of the system under investigation is most likely to remain constant?
• When heat is given to gas in an isothermal change, the result will be

⚔️ Practice NEET Chemistry free + battle 1v1 →