Qhov sib txawv tseem ceeb ntawm coefficient thiab subscript yog qhov coefficient muab cov lej ntawm cov khoom, whereas subscript muab cov naj npawb ntawm cov atoms nyob rau hauv ib lub molecule.
Cov ntsiab lus coefficient thiab subscript yog qhov tseem ceeb hauv chemistry, tshwj xeeb hauv kev sau tshuaj sib npaug rau cov tshuaj tiv thaiv. Ob nqe lus no hais txog cov lej, tab sis lawv muab cov ntsiab lus sib txawv ntawm cov tshuaj tiv thaiv tshwj xeeb.
Coefficient yog dab tsi?
Ib tus coefficient yog tus lej uas muab cov lej ntawm cov moles ntawm cov tshuaj uas koom nrog hauv cov tshuaj tiv thaiv tshwj xeeb. Peb sau tus lej no nyob rau pem hauv ntej ntawm cov khoom thaum sau cov qauv tshuaj. Tsis tas li ntawd, peb tuaj yeem sau cov coefficient hauv tib qhov loj li lwm cov cim tshuaj (tsis yog cov ntawv sau lossis cov ntawv sau). Cia peb xav txog cov tshuaj tiv thaiv hauv qab no ua piv txwv.
N2 + 3H2 ⟶ 2NH3
Nyob rau hauv cov tshuaj tiv thaiv saum toj no, "3" nyob rau hauv pem hauv ntej ntawm H 2 and "2" pem hauv ntej ntawm NH 3 yog coefficients. Txawm hais tias tsis muaj coefficient nyob rau hauv pem hauv ntej ntawm N 2, koj yuav tsum paub tias muaj "1". Cov lej no qhia tias cov tshuaj tiv thaiv no xav tau ib lub mole ntawm cov pa nitrogen thiab peb lub moles ntawm hydrogen gas kom ua tiav, muab ob lub moles ntawm ammonia.
Subscript yog dab tsi?
A subscript yog tus lej uas muab cov lej ntawm atoms nyob rau hauv ib qho molecule. Tus lej yog qhov tseem ceeb hauv kev sau cov qauv tshuaj ntawm cov tshuaj thiab cov tshuaj sib npaug rau cov tshuaj tiv thaiv. Tsis tas li ntawd, cov ntawv sau tau sau rau hauv qhov me me dua li lwm cov cim tshuaj hauv cov qauv; peb kuj sau nws hauv qab ntawm lub cim ntawm lub atom tshwj xeeb. Cia peb xav txog tib yam piv txwv li saum toj no.
Hauv qhov piv txwv saum toj no, cov roj nitrogen muaj ob lub nitrogen atoms ib molecule; Yog li ntawd, lub subscript yog "2". Rau cov pa roj hydrogen, subscript yog tib yam. Tab sis nyob rau hauv ammonia molecule, muaj ib tug nitrogen atom; yog li, tus subscript yog "1", tab sis peb tsis sau nws vim raws li txoj cai dav dav. Yog li ntawd, yog tias nws tsuas muaj lub cim thiab tsis muaj ntawv sau npe, ces nws yog qhov tseem ceeb "1". Ammonia molecule muaj peb hydrogen atoms. Yog li, tus subscript muaj "3".
Qhov txawv ntawm Coefficient thiab Subscript yog dab tsi?
Ob qho tib si coefficient thiab subscript xa mus rau cov lej, tab sis lawv muab cov ntsiab lus sib txawv ntawm cov tshuaj tiv thaiv tshwj xeeb. Qhov sib txawv tseem ceeb ntawm coefficient thiab subscript yog tias coefficient muab tus naj npawb ntawm moles ntawm ib yam khoom, whereas subscript muab tus naj npawb ntawm atoms tam sim no nyob rau hauv ib lub molecule. Piv txwv li, nyob rau hauv chemical equation "N2 + 3H2 ⟶ 2NH3", tus coefficient nyob rau hauv pem hauv ntej ntawm nitrogen gas yog 1, thiab cov coefficient nyob rau hauv pem hauv ntej ntawm hydrogen yog 3; nyob rau hauv pem hauv ntej ntawm ammonia, tus coefficient yog 2. Piv txwv li, “N2 + 3H2 ⟶ 2NH3 ", cov ntawv sau ntawm nitrogen hauv cov pa roj nitrogen yog 2, tab sis hauv ammonia molecule, cov ntawv sau ntawm nitrogen atom yog 1.
Hauv qab infographic qhia txog qhov sib txawv ntawm coefficient thiab subscript.
Summary – Coefficient vs Subscript
Ob nqe lus coefficient thiab subscript yog xa mus rau cov lej, tab sis lawv muab cov ntsiab lus sib txawv ntawm cov tshuaj tiv thaiv tshwj xeeb. Qhov sib txawv tseem ceeb ntawm coefficient thiab subscript yog tias coefficient muab tus naj npawb ntawm moles ntawm ib yam khoom, whereas subscript muab tus naj npawb ntawm atoms tam sim no nyob rau hauv ib lub molecule.
