Question

The value of $\Delta G$ for the process ${{H}_{2}}{{O}_{\left( s \right)}}\to {{H}_{2}}{{O}_{\left( l \right)}}$ at $1$ atm and $260K$ is:
A.$<0$
B.$=0$
C.$>0$
D.Unpredictable

Answer 1

We know that the relation between the equilibrium constant of a reaction and its free energy. Gibbs free energy or the Gibbs function is a thermodynamic function which is used for the calculation of the maximum work performed by a system at constant temperature and pressure.

Complete answer:
Spontaneity is part of the first law of thermodynamics and the fact associated with an isolated system's fixed energy level. There is a direction of heat flow that can be elaborated by establishing a relation between the work done by the system or on the system. This is spontaneity in thermodynamics. Spontaneous meaning in Chemistry is not that hard to understand. Many natural phenomena have one straight path of heat flow. They do not have any limitations on their heat flow paths. As evidence, we can take our universe. We know our universe tends towards the highest entropy. Also, for example, we can take the campfire. This is a perfect example of entropy. Here, wood (solid object) turns into ash, smoke, and gas. This is the end where at first; the energy was there when the wood was burning. So, the woods work as a solid fuel that spreads energy.
Many things happening around us are related to entropy. We can’t check entropy as a bad or a good chemical process. It is happening to sustain life. At $T<273K$ ice remains as ice and water converts into ice. So, ice to water conversion is not a spontaneous process. $\Delta G>0$ for ${{H}_{2}}{{O}_{\left( s \right)}}\to {{H}_{2}}{{O}_{\left( l \right)}}$ at $260K.$
Therefore, the correct answer is option C.

Note:
Remember that the enthalpy is the alteration of the amount of heat in a system when the temperature is constant. Enthalpy is not the same as heat. Heat is an energy that transfers from one system to another or surrounding due to temperature differences.