2003 Exam_Information_Sheet - 132 Midterm Examination...

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132 Midterm Examination – Equations and Data R = 8.314 J/mol.K = 8.314 kPa.l/mol.K = 0.0821 atm.L/mol.K STP = standard temperature and pressure = 273.2 K and 101.3 kPa SATP = standard ambient temp. and press. = 298 K and 100.0 kPa Equations for finding E, H, q and w E = q + w (special case E = q v) ; H = E + PV (special case H =q p) For isothermal processes w = -nRTln(V 2 /V 1 ) = -nRTln(P 1 /P 2 ) (reversible); w = - PV (irreversible) For adiabatic processes T 1 V 1 γ -1 = T 2 V 2 γ -1 ; P 1 V 1 γ = P 2 V 2 γ where γ = c p /c v (reversible) E = nc v T = w c p - c v = R H = E + PV = E + (P 2 V 2 – P 1 V 1 ); H = nc p T Equations for finding S In general, S =∫ q rev /T ; S vap = H vap /T b ; S vap = 88 J/mol.K (Trouton’s rule) Entropy, Enthalpy and Free Energy Changes for Individual Substances S = nc p ln(T 2 /T 1 ); S = nc v ln(T 2 /T 1 ); S = nRln(V 2 /V 1 ) and S = nRln(P 1 /P 2 ) constant T S tot =∆ S sys +∆ S sur; G = nRTln(P 2 /P 1 ) Changes Occurring During Reactions X reaction = Σ∆ X f (products) –
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