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轉學考-普通化學
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91年 - 91 淡江大學 轉學考 普通化學#56133
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題組內容
15 predict the sign of the Gibbs free energy change for the reactions at low temperature, for which
(B) All is positive and AS is negative Explain your predictions.
其他申論題
(B) a triple bond
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(A) HCl(g) in water and in pentane, C5H12(l).
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(B) Water in liquid LIF and in gasoline.
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(A) All is negative and AS is positive
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16 Docs the concentration of a homogeneous catalyst appear in (lie rate law for a catalyzed reaction? Explain.
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17 Explain why oxalic acid can be used to remove rust stains. Write a balanced equation for the reaction involved.
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18 The value of equilibrium constant for a reaction increases as the temperature is increased. Is the forward reaction exothermic or endothermic? What can one say about the enthalpy change for the reverse reaction?
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19 Both sodium chloride and magnesium oxide are ionic solids, yet magnesium oxide melts at a temperature about 2000 K higher than sodium chloride. Explain why.
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20 Explain why the structural isomers dimethyl ether (bp = -23 °C) and ethanol (bp = 78.3 °C) differ significantly in their boiling points? What simple chemical test could be used to distinguish ethanol from dimethyl ether?
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【已刪除】1. (10%) Determine whether the set of column vectors is linearly independent.
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