Entropy and phase changes 0.0 / 5 ? EngineeringEquilibrium thermodynamicsUniversityNone Created by: OmololaS15Created on: 31-12-18 13:36 Give the equation for the entropy of a phase transition and how does it come about? ∆_trsS。= ∆_trsH。/T (T is constant for phase transitions so it comes out the integral + assume that system is at constant pressure) 1 of 10 What is 'Trouton's rule' ? All substances have similar ∆_vapS。 (~10.5R) 2 of 10 What is 'Richard's rule'? All substances have similar ∆_fusS 。 (~1R) 3 of 10 Give an equation that links q_surr and q_system q_surr = - q_system 4 of 10 State the equation for reversible work w_rev = -nRT*ln(V_f/V_i) 5 of 10 State the equation for heat (q)in a reversible system q_sys,rev = -w_rev 6 of 10 State the equation for entropy of a reversible system ∆S_sys = nR*ln(V_f/V_i) 7 of 10 What kind of system do the above equations describe? Reversible isothermal expansion 8 of 10 Give an equation that links ∆S。,C_p and T (what do we assume) ∆S。 = C_p* ln(T_f/ T_i) [ assumption: C_p is constant with temperature) 9 of 10 Give an equation that links S,C_p and T S。(T_f) = S。(T_i)+C_p*ln(T_f/ T_i) 10 of 10
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