CHEM 130B Study Guide - Midterm Guide: Ideal Gas, Kolmogorov Space, Hand Warmer
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Write solutions clearly on separate pages: answer true or false and provide your reason in 10 words or less, for any change of state, the sum of w + q is path independent. (5pt) True: w + q = !u and u is a state variable hence path independent: for any change of state, !s is path independent. (5pt) True: since s is a state variable !s is path independent. If heat is exchanged between a system and its surroundings at constant temperature during a reversible process, then !s for the universe = 0. (5pt) !suniverse = 0 for all reversible processes (by definition of a reversible process) Tsys = tsurr: for an irreversible expansion of a gas against a low external pressure (e. g. pex < Pint), the magnitude of the irreversible work must be greater than the work done for the same state change on a reversible path: |wirr| > |wrev|. (5pt)
