Anonymous
Anonymous asked in 科學化學 · 2 decades ago

化學原文翻譯,急須大師help!感激不盡

that of the reactants represents the heat of the reaction and is given the symbol

△H. In an exothermic process, the potential energy of the products is lower

than the potential energy of the reactants. This means that the recoiling molecules

eventually have more kinetic energy than the reacting molecules.

In other words, the product molecules are “hotter.”When the potential energy

of the reactants is lower than that of the products, the reaction is endothermic

and the product molecules are “cooler.”An actual endothermic reaction

between N2 and O2 to form NO is represented in Figure 14-3.

Perhaps one of the most significant characteristics of any chemical reaction

is its activation energy. Consider, for example, the reactions of two nonmetals

with oxygen. An allotrope of phosphorus known as white phosphorus

reacts almost instantly with the oxygen in the air, even at room temperature,

producing an extremely hot flame. As a result, this form of phosphorus must

be stored under water to prevent exposure to the air. Hydrogen also reacts

with oxygen to form water. This is also a highly exothermic reaction that is

used in space rockets. A mixture of hydrogen and oxygen, however, does not

react at room temperature. In fact, no appreciable reaction occurs unless the

temperature is raised to at least 400oc or the mixture is ignited with a spark.

The difference in the rates of combustion of these two elements at room temperature

lies in the activation energies of the two reactions. Figure 14-4 illustrates

the activation energies for the combustion reactions of hydrogen and phosphorus.

Update:

請儘量不要用電腦直接翻.因為功能我有.只是答案不夠完整!像N2 O2等化學名詞要翻出來~謝謝

3 Answers

Rating
  • 吉米
    Lv 6
    2 decades ago
    Favorite Answer

    用符號ΔH代表一反應物的反應熱。

    在放熱的過程中,產物的位能比反應物的位能低。

    這個意思是回應的分子(?)最終比反應分子擁有更多的動能。

    換句話說,產物分子將比較熱(好怪),在反應物的位能比產物的位能還低時,

    (前兩句對調應該會比較順)如果反應爲吸熱的話,產物分子則比較冷。

    一個實際上的吸熱反應在氮氧和氧氣所組成一氧化氮用圖表14-3表示。

    或許在每一個化學反應中值得注意的特徵是其活化能。

    想想看,例如兩個非金屬和氧發生反應,一個所知的磷之同素異形體白磷

    在空氣中幾乎能和氧氣發生反應,既使在室溫下,也能製造出極高溫的火焰。

    結果,這種磷的特性使得它必需貯藏在水中防止其暴露在空氣中。

    氫也可和氧反應成水,這同時也是高放熱的反應,其被使用在太空火箭上。

    一氫氣和氧氣的混合物,無論如何,都不會在室溫下發生反應。

    事實上,無法觀察到反應的發生,除了溫度上升到400oc(這是400℃嗎?)

    或著將混合物點燃至燃燒。

    兩個元素在室溫下燃燒的速率不同在於兩個反應的活化能不同。

    圖表14-4舉例氫氣和磷的活化能對於燃燒反應的影響。

    呼....真累~還是看原文比較輕鬆

    我想我翻得應該很容易懂吧....希望能幫助到你

    Source(s): 自己
  • Anonymous
    2 decades ago

    嗯~~的確很強的翻譯!!謝謝你唷~^^

  • 小胖
    Lv 4
    2 decades ago

    回應物的描述回應的熱並且被給符號

    >在一個放熱的過程裡的H.,產品的位能更低

    比回應物的位能。 這表明退縮的分子

    與回應的分子相比較,最終有更多的動能。

    換句話說,產品分子是‥hotter。 〃When 位能

    回應物比產品的低,回應是吸熱的

    並且產品分子是‥cooler。 〃An 真實吸熱回應

    在N2 和要形成的O2之間沒有被表示為圖14-3。

    或許任何化學回應的最重要的特性之一

    是它的活動精力。 例如考慮兩非金屬的回應

    由於氧。 稱為白色的磷的磷的allotrope

    在空中用氧幾乎立刻起作用,即使在室溫,

    生產一束極其熱的火焰。 因此,磷的這個形式必須

    被儲存在水下對空氣防止暴露。 氫也起作用

    由於氧形成水。 這也一非常放熱回應

    在太空火箭裡使用。 一種氫和氧的混合物,不過,不的母鹿

    在室溫回應。 實際上,沒有看得出回應發生除非

    溫度被提升到至少400oc或者混合物被一個火花點燃。

    在室溫的這兩種元素的燃燒的比率的差別

    在于兩個回應的活動能量。 14-4 身材說明

    氫和磷的燃燒回應的活動能量。

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