Question

Chapter 18 Thermodynamics Homework 1.Predict the sign of AS for each process: a) The boiling of water b)2HgO(s)-2Hg(I) + 02(s) c) CaCO, (s)CaO(s)+ CO (g) 2. Is the following process spontaneous or nonspontaneous at a given temperature? NaNO,(s) ->NaNO,(aq) 3. If a reaction has ΔS < 0 and ΔΗ < 0 will the reaction always be spontaneous, spontaneous at low T, spontaneous at high T, or never spontaneous? 4.Consider this reaction: Calculate ΔG at 25 °C and determine whether the reaction is spontaneous. Does AG become more negative or more positive as the temperature increases? 5. Consider the following reaction at 298 K: 2H2S(g) +SO2(g)-»3S (s, rhombic) +2H,O (g) A -102kJ Calculate Δ P 2.00 atm; P- 1.50 atm; P 0.0100 atm. Is the reaction more or less spontaneous under these conditions than under standard conditions? (AG-AG +RTlnQ.) 6.For the autoionization of water at 25°C, H2Ol) H(a OH(aq) Kw 1.0x 10-14. What is ΔG for the process?

Answer 1

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