Question

Even though the process is endothermic, snow can sublime. Which tendency in nature accounts for this phase change?

(1) a tendency toward greater entropy(2) a tendency toward greater energy(3) a tendency toward less entropy(4) a tendency toward less energy

Answer 1

Even though the process is endothermic, snow can sublime. The tendency in nature that accounts for this phase change is that there is a tendency toward greater entropy. The answer is number 1. The rest of the choices do not answer the question above.

Answer 2

Answer: The correct answer is Option 1.

Step-by-step explanation:

It is given that the process is endothermic which means that
`\Delta H=+ve`

The snow is subliming which means that it is changing its state from solid state to gaseous state directly and for this phase change to take place,
`\Delta G` must be negative.

As, for sublimation process,
`\Delta S` is always increasing and for spontaneous reaction, temperature must also be high.

`\Delta G=\Delta H-T\Delta S`

`-ve=+ve-T(+ve)`

At higher temperature,
`\Delta G` will always be negative and it will be spontaneous reaction and phase change will occur.

Hence, the correct answer is Option 1.