Q3. (a) State in words each of the four laws of thermodynamics [4] (b) i) Use the first law of thermodynamics for a closed, stationary system and the Clausius statement of the second law of thermodynamics for a reversible process to show that Gibbs equation is Tds = du + Pdv ent novo willw mot O to where T is temperature, s is specific entropy, u is specific internal ofIT .m)Wenergy, P is pressure and v is specific volume. [6] bos 098- ii) Use the approach described above together with conservation of en mon bus entropy to obtain an expression for Gibbs energy. [4] (C) An air-powered bicycle has 12 litre tank of air compressed to 50bar at ambient temperature. What is the Gibbs energy of the air in the tank? [6]