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[問題] Born harber cycle同enthalpy level diagram一唔一樣?

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Born harber cycle同enthalpy level diagram一唔一樣?

Born harber cycle同enthalpy level diagram一唔一樣?

另外想問呢個

b) The sulphur dioxide content in white wine was determined by an experiment described below:
25.0 cm3 of a sample of white wine was transferred to a conical flask.
15 cm3 of 1 M NaOH(aq) was added to the flask and the mixture was allowed to stand for 15 minutes.
15 cm3 of 2M H2SO4(aq) was then added and the resulting solution was quickly titrated with 0.0050 M I2(aq).
12.9 cm3 of the I2(aq) was required to reach the titration end point.
i) What is the purpose of adding the 2M H2SO4(aq)?
ii) Why should the titration be carried out quickly?
iii) Briefly describe how the end point of the titration can be determined.
iv) Calculate the sulphur dioxide content, in mgdm-3, in the sample of white wine.
(6 marks)

我想問有冇人可以解釋下行左D咩REACTION?
   

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Please help

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Born harber cycle 係用箭咀指到個圈出來個隻
Enthalpy level diagram係一個有x-y axis plot出來有一條條劃線個隻

ps:記住睇題目有冇require你畫邊種

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http://en.wikipedia.org/wiki/Born%E2%80%93Haber_cycle
點解比左enthalpy level diagram既?

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