For the following example, identify the following: F2(l) ? F2(g) A. at low temperature, the...

Question:

For the following example, identify the following:

F2(l) ? F2(g)

A. at low temperature, the reaction is spontaneous and ?G < 0 and at high temperature, the reaction is spontaneous and ?G < 0

B. at low temperature, the reaction is nonspontaneous and ?G > 0 and at high temperature, the reaction is spontaneous and ?G < 0

C. at low temperature, the reaction is spontaneous and ?G < 0 and at high temperature, the reaction is nonspontaneous and ?G > 0 at low temperature, the reaction is nonspontaneous and ?G > 0 and at

D. high temperature, the reaction is nonspontaneous and ?G > 0

E. It is not possible to determine without more information.

Phase Changes

A compound can change phase depending on the pressure as well as temperature. For example, a liquid will boil if the pressure is low enough since the boiling point occurs when the vapour pressure of the liquid is equal to the pressure. The pressure and temperature impact the Gibbs free energy of the material which determines whether a phase is the most stable under the conditions.

Answer and Explanation:

Under a constant pressure a liquid turns into a gas when the temperature raises the boiling point. Under this temperature the liquid will stay a liquid while over this temperature the liquid turn into a gas. A process is spontaneous when {eq}\Delta G {/eq} is negative.

Therefore the answer is B. at low temperature, the reaction in nonspontaneous and {eq}\Delta G > 0 {/eq} and at high temperature, the reaction is spontaneous and {eq}\Delta G < 0 {/eq}.


Learn more about this topic:

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Phase Changes and Heating Curves

from Chemistry 101: General Chemistry

Chapter 6 / Lesson 3
45K

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