CHE 2B Lecture Notes - Lecture 3: Kolmogorov Space, Enthalpy, Intermolecular Force
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Ex - the volume of a balloon changes from 4x106 l to. Assume the balloon faces constant pressure of 1 atm. Find the change in internal energy of the system ( u). State function: property only depends on current state of the system. How the system arrived at the state does not matter. It is independent of the path to the state. The difference in height is the same regardless of the path taken from point 1 to point 2. The work of path "ii" is greater than the work of path "i" w(ii) > w(i) U of ideal gas depends on t, but not p and v. Joules 2nd law: ideal gas particles do not interact with each other (there are no intermolecular forces). U only comes from motion (ke) which is a function of t. An ideal gas with t=0 also has u=0, thus u is constant.
