Unformatted text preview: κ is the isothermal compressibility. (b) For mercury, α = 1 . 82 × 104 /K and κ = 3 . 87 × 105 /atm at 20 ◦ C. Determine how entropy changes with volume under isothermal conditions at this temperature. 5. Derive ∂ ± Δ G T ² ∂ ± 1 T ² p = Δ H from ∂ (Δ G/T ) ∂T ! p =Δ H T 2 . 6. By approximating ∂ ± Δ G T ² ∂ ± 1 T ² p = Δ H as Δ ± Δ G T ² Δ ± 1 T ² p ≈ Δ H, predict the value of Δ G (100 ◦ C, 1 atm) of the reaction 2 H 2 (g) + O 2 (g)→ 2 H 2 O( ‘ ), given that Δ G (25 ◦ C, 1 atm) =474 . 36 kJ and Δ H =571 . 66 kJ. Assume constant pressure and Δ H . 7. What is the change in G for a process in which 0.022 mole of an ideal gas goes from 2505 psi (pounds per square inch) to 14.5 psi at room temperature of 295 K?...
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This note was uploaded on 07/17/2008 for the course CHEM 520 taught by Professor Grandinetti during the Spring '08 term at Ohio State.
 Spring '08
 GRANDINETTI
 Physical chemistry, pH

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