Seeking help with a question in physical chemistry
Thread Content
Please help to check whether the following statements are correct. Thank you. 1. The entropy and Gibbs free energy of an ideal gas are functions only of temperature. 2. For a pure substance, for vapor to turn into liquid, a phase change process of condensation must occur. 3. The triple point of a pure substance changes depending on the pressure or temperature applied
All wrong. 1. S, A, and G are all related to pressure. 2. It is possible to cross the critical point, or to undergo sublimation first and then melting. 3. The degree of freedom at the triple point of a pure substance is 0.