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疊氮化鈉安全氣囊反應(yīng)方程式-疊氧化鈉被廣泛應(yīng)用于汽車安全氣囊

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  1. 疊氮化鈉(NaN3)是一種無色晶體,廣泛用于汽車安全氣囊及化工合成等.常見的兩種制備方法為:2NaNH2+N2O
  2. 每輛車的安全氣囊有多少升疊氮化鈉

化學(xué)原理:汽車的安全氣囊內(nèi)有疊氮化鈉(NaN3)或硝酸銨(NH4NO3)等物質(zhì)。當(dāng)汽車在高速行駛中受到猛烈撞擊時,這些物質(zhì)會迅速發(fā)生分解反應(yīng),產(chǎn)生大量氣體,充滿氣囊。[疊氮化鈉分解產(chǎn)生氮?dú)夂凸虘B(tài)鈉;硝酸銨分解產(chǎn)生大量的一氧化二氮(N2O)氣體和水蒸氣]

具體可參照:百度百科,那里有介紹,很詳細(xì)!

疊氮化鈉(NaN3)是一種無色晶體,廣泛用于汽車安全氣囊及化工合成等.常見的兩種制備方法為:2NaNH2+N2O

太平洋汽車網(wǎng)是氮?dú)猓瑫?.1秒的時間內(nèi)膨脹,在安全氣囊當(dāng)中存在固體的疊氮化鈉,這種固體在受到撞擊后會迅速生成大量的氮?dú)?,安全氣囊的使用可?a href="/tags-y-x.html" target="_blank" class="f9b330b2f318701c relatedlink">有效地保護(hù)車內(nèi)乘客的安全。

疊氮化鈉安全氣囊反應(yīng)方程式-疊氧化鈉被廣泛應(yīng)用于汽車安全氣囊
(圖片來源網(wǎng)絡(luò),侵刪)

汽車安全氣囊中的氣體是氮?dú)?,會?.1秒的時間內(nèi)膨脹,在安全氣囊當(dāng)中存在固體的疊氮化鈉,這種固體在受到撞擊后會迅速生成大量的氮?dú)猓嬎愎绞荖aN3=NaH+N2,安全氣囊的使用可以有效地保護(hù)車內(nèi)乘客的安全。

汽車安全氣囊的作用:在發(fā)生交通事故時,汽車安全氣囊有助于減輕胸、頭和面部在碰撞時受傷的嚴(yán)重性。在汽車發(fā)生碰撞前時,首先是汽車要停止運(yùn)動,車內(nèi)乘員的慣性力作用下仍以原來速度繼續(xù)向前運(yùn)動。隨著汽車停止運(yùn)動而逐漸停止向前運(yùn)動,當(dāng)碰撞比較兇猛時,乘員向前運(yùn)動更快,即使佩戴了安全帶,在安全帶使乘員完全停止運(yùn)動前,他們?nèi)詴c車內(nèi)物相碰。如果此時裝在轉(zhuǎn)向盤或儀表板內(nèi)的氣囊充氣彈出,它就可以保護(hù)乘員減少其與車內(nèi)物相碰的可能性,更均勻地分散頭、胸的碰撞力,吸收乘員的運(yùn)動能量,從而起到補(bǔ)充安全帶效果的作用。

汽車安全氣囊的工作原理:汽車行駛過程中,傳感器系統(tǒng)不斷向控制裝置發(fā)送速度變化信息,由控制裝置對這些信息加以分析判斷,如果所測的加速度、速度變化量或其它指標(biāo)超過預(yù)定值(即真正發(fā)生了碰撞),則控制裝置向氣體發(fā)生器發(fā)出點(diǎn)火命令或傳感器直接控制點(diǎn)火,點(diǎn)火后發(fā)生爆炸反應(yīng),產(chǎn)生N2或?qū)夤拗袎嚎s氮?dú)忉尫懦鰜沓錆M碰撞氣袋。乘員與氣袋接觸時,通過氣袋上排氣孔的阻尼吸收碰撞能量,達(dá)到保護(hù)乘員的目的。

每輛車的安全氣囊有多少升疊氮化鈉

(1)①氮原子的L層上,2s能級上有2個電子、2p能級上有3個電子,根據(jù)能量最低原理、洪特規(guī)則、保里不相容原理知,其L層電子排布圖為,故答案為:;

②同一周期中,元素第一電離能隨著原子序數(shù)的增大而呈增大趨勢,但第IIA族、第VA族元素大于相鄰元素,所以第二周期元素中第一電離能最大的是Ne,故答案為:Ne;

③價電子數(shù)相等、原子個數(shù)相等的微?;コ獾入娮芋w,與N3互為等電子體的粒子有CO2等,故答案為:CO2等;

④氨氣分子中氮原子和每個氫原子之間都存在一個共用電子對,氨氣分子的電子式為,故答案為:;

(2)NH3中存在氫鍵,N2O中不存在氫鍵,氫鍵的存在導(dǎo)致NH3沸點(diǎn)(-33.34℃)比N2O沸點(diǎn)(-88.49℃)高,故答案為:氨氣分子間存在氫鍵;

(3)NO-3中價層電子對個數(shù)=3+

1
2
(5+1-3×2)=3且不含孤電子對,所以其空間構(gòu)型為平面三角形,故答案為:平面三角;

(4)A.金屬鐵的導(dǎo)電性是由于通電時自由電子作定向移動,電子不是通電才產(chǎn)生的,故錯誤;

B.α-Fe、γ-Fe的堆積方式分別與鉀和銅相同,α-Fe為體心立方堆積,γ-Fe為面心立方堆積,故正確;

C.空間利用率α-Fe小于γ-Fe,故錯誤;

D.金屬晶體中存在金屬鍵,所以金屬鐵內(nèi)部存在金屬鍵,故正確;

故選BD;

(5)α-Fe中Fe原子個數(shù)=1+8×

1
8
=2,γ-Fe中Fe原子個數(shù)=8×
1
8
+6×
1
2
=4,設(shè)Fe原子半徑為r,α-Fe中晶胞邊長=
4r
3
,γ-Fe中晶胞的邊長=
4r
2
,α-Fe密度ρ=
m
V
=
56
NA
×2
(
4r
3
)3
,γ-Fe密度=
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    <mark id="1nokv"></mark>
    56
    NA
    ×4
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    50至90升。疊氮化鈉受撞擊時能在瞬間完全分解為鈉和氮?dú)?,故可?yīng)用于汽車安全氣囊,氮?dú)猱a(chǎn)生是有一定量的,最佳是56克氮?dú)?,若產(chǎn)生56克的氮?dú)猓枰?0至90升的疊氮化鈉,所以每輛車的安全氣囊有50至90升疊氮化鈉。疊氮化鈉亦稱“三氮化鈉”,化學(xué)式NaN3,分子量65.01,白色六方系晶體,無味,無臭,純品無吸濕性。

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