Answer the questions:
1. One mole of an ideal monoatomic gas expands adiabatically and reversibly from 500°C and 10 atm
25°C. Calculate AS, AH, AE, AG, q, and w.
2. For the gaseous reaction C2H2 + D2O = C2D2 + H2O, AH=520 cal and Kp =0.80 at 25°C. How many moles
of C2D2 are formed when 2 mole of C2H2 and 1 mole of D2O are mixed at 100°C and at a total pressure of
atm? Assume that Cp for is the same as for C2D2 and that Cp for H2O and D2O are also the same.
3. Assuming ideal solution behavior, calculate the free energy, enthalpy, and entropy of mixing of 0.25
mole of benzene with 0.50 mole of toluene at 30°C.
4. The normal boiling point elevation for a solution of 10 g of sucrose in 400 g of ethanol is 0.0891°C.
Given that 8 g of a substance of unknown molecular weight raises the boiling point by 0.250 °C when
dissolved in 400 g of ethanol, calculate the molecular weight of the unknown and Kb of ethanol.
5. The standard Gibbs energies of formation of gaseous cis-2-butene and trans-2-butene are 67.15 kJ
mol-1 and 64.10kJ mol-1, respectively. Calculate the ratio of equilibrium pressures of the gaseous
isomers at 298 K.
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