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a, Ta có: \(n_{C_2H_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
PT: \(2C_2H_2+5O_2\underrightarrow{^{t^o}}4CO_2+2H_2O\)
\(n_{O_2}=\dfrac{5}{2}n_{C_2H_2}=0,5\left(mol\right)\Rightarrow V_{O_2}=0,5.22,4=11,2\left(l\right)\)
b, \(V_{kk}=\dfrac{V_{O_2}}{20\%}=56\left(l\right)\)
c, - Hiện tượng: Br2 nhạt màu dần.
PT: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
\(2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\\ n_{C_2H_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ n_{CO_2}=2.0,25=0,5\left(mol\right)\\ a,V_{CO_2\left(đktc\right)}=0,5.22,4=11,2\left(l\right)\\ b,n_{O_2}=\dfrac{5}{2}.0,25=0,625\left(mol\right)\\ V_{O_2\left(đktc\right)}=0,625.22,4=14\left(l\right)\\ V_{kk\left(đkct\right)}=\dfrac{100}{20}.14=70\left(lít\right)\)
\(n_{C_2H_2}=\dfrac{2,8}{22,4}=0,125\left(mol\right)\\ a,2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\\ b,n_{CO_2}=0,125.2=0,25\left(mol\right)\\ m_{CO_2}=0,25.44=11\left(g\right)\\ c,n_{O_2}=\dfrac{5}{2}.0,125=0,3125\left(mol\right)\\ V_{O_2\left(đktc\right)}=0,3125.22,4=7\left(l\right)\\ \Rightarrow V_{kk\left(đktc\right)}=\dfrac{100}{20}.7=35\left(l\right)\)
\(n_{C_2H_2}=\dfrac{8.96}{22.4}=0.4\left(mol\right)\)
\(C_2H_2+\dfrac{5}{2}O_2\underrightarrow{^{t^0}}2CO_2+H_2O\)
\(0.4.........1\)
\(V_{O_2}=1\cdot22.4=22.4\left(l\right)\)
\(V_{kk}=5V_{O_2}=5\cdot22.4=112\left(l\right)\)
\(n_{C_2H_4}=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
\(C_2H_4+3O_2\underrightarrow{^{t^0}}2CO_2+2H_2O\)
\(0.25.....0.75.......0.5\)
\(V_{kk}=5V_{O_2}=5\cdot0.75\cdot22.4=84\left(l\right)\)
\(m_{CO_2}=0.5\cdot44=22\left(g\right)\)
\(n_{C_2H_4}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
PT: \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
Theo PT: \(n_{O_2}=3n_{C_2H_4}=0,75\left(mol\right)\Rightarrow V_{O_2}=0,75.22,4=16,8\left(l\right)\)
\(\Rightarrow V_{kk}=\dfrac{V_{O_2}}{20\%}=84\left(l\right)\)
\(n_{CO_2}=\dfrac{4,48}{22,4}=0,2mol\)
\(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
0,2 0,6 0,4 0,6
a)\(m_{C_2H_5OH}=0,2\cdot46=9,2g\)
b)\(V_{O_2}=0,6\cdot22,4=13,44l\)
\(\Rightarrow V_{kk}=5V_{O_2}=5\cdot13,44=67,2l\)
a) C2H5OH + 3O2 --to--> 2CO2 + 3H2O
b) \(n_{C_2H_5OH}=\dfrac{2,3}{46}=0,05\left(mol\right)\)
PTHH: C2H5OH + 3O2 --to--> 2CO2 + 3H2O
0,05-->0,15-------->0,1
=> VCO2 = 0,1.22,4 = 2,24 (l)
c) VO2 = 0,15.22,4 = 3,36 (l)
=> Vkk = 3,36 : 20% = 16,8 (l)
\(n_{C_2H_2}=\dfrac{5,6}{22,4}=0,25mol\)
\(C_2H_2+\dfrac{5}{2}O_2\underrightarrow{t^o}2CO_2+H_2O\)
0,25 0,625
\(V_{O_2}=0,625\cdot22,4=14l\)
\(V_{kk}=5V_{O_2}=5\cdot14=70l\)
\(n_{C_2H_2}=\dfrac{5,6}{22,4}=0,25mol\)
\(2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\)
0,25 0,625 ( mol )
\(V_{O_2}=0,625.22,4=14l\)
\(V_{kk}=V_{O_2}.5=14.5=70l\)