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a, \(CH_4+2O_2\underrightarrow{^{t^o}}CO_2+2H_2O\)
\(C_2H_4+3O_2\underrightarrow{^{t^o}}2CO_2+2H_2O\)
b, Gọi: \(\left\{{}\begin{matrix}n_{CH_4}=x\left(mol\right)\\n_{C_2H_4}=y\left(mol\right)\end{matrix}\right.\) \(\Rightarrow x+y=\dfrac{4,48}{22,4}=0,2\left(mol\right)\left(1\right)\)
Theo PT: \(n_{O_2}=2n_{CH_4}+3n_{C_2H_4}=2x+3y=\dfrac{15,68}{22,4}=0,7\left(mol\right)\left(2\right)\)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=-0,1\\y=0,3\end{matrix}\right.\)
Đến đây thì ra số mol âm, bạn xem lại đề nhé.
Sửa đề: 13,4 (l) → 13,44 (l)
Ta có: \(n_{CH_4}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)
PT: \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
_____0,6___1,2___0,6 (mol)
a, \(V_{O_2}=1,2.22,4=26,88\left(l\right)\)
b, \(V_{CO_2}=0,6.22,4=13,44\left(l\right)\)
c, \(V_{kk}=5V_{O_2}=134,4\left(l\right)\)
\(n_{C_2H_4}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\\ PTHH:C_2H_4+3O_2\rightarrow\left(t^o\right)2CO_2+2H_2O\\ n_{O_2}=3.0,4=1,2\left(mol\right);n_{CO_2}=0,4.2=0,8\left(mol\right)\\ a,V_{O_2\left(đktc\right)}=22,4.1,2=26,88\left(l\right)\\ b,V_{kk\left(đktc\right)}=\dfrac{100}{20}.26,88=134,4\left(l\right)\\ c,CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow\left(trắng\right)+H_2O\\ n_{CaCO_3}=n_{CO_2}=0,8\left(mol\right)\\ m_{kết.tủa}=m_{CaCO_3}=100.0,8=80\left(g\right)\)
nCH4 = 2.24/22.4 = 0.1 (mol)
CH4 + 2O2 -to-> CO2 + 2H2O
0.1____0.2______0.1
VO2 = 0.2*22.4 = 4.48 (l)
VCO2 = 0.1*22.4=2.24 (l)
\(n_{CH_4}=\dfrac{2,24}{22,4}=0,1mol\)
\(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
0,1 0,2 0,1
\(V_{O_2}=0,2\cdot22,4=4,48l\)
\(V_{CO_2}=0,1\cdot22,4=2,24l\)
\(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
\(\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
\(nO_2=3.0,25=0,75\left(mol\right)\)
\(VO_2=0,75.22,4=16,8\left(l\right)\)
\(nCO_2=2.0,25=0,5\left(mol\right)\)
\(VCO_2=0,5.224=11,2\left(l\right)\)
\(n_{CH_4}=\dfrac{2.24}{22.4}=0.1\left(mol\right)\)
\(a.\)
\(CH_4+2O_2\underrightarrow{^{^{t^0}}}CO_2+2H_2O\)
\(0.1........0.2.......0.1\)
\(V_{O_2}=0.2\cdot22.4=4.48\left(l\right)\)
\(b.\)
\(V_{CO_2}=0.1\cdot22.4\cdot75\%=1.68\left(l\right)\)