Question

Какой объем пропилового спирта (p=0,8 г/см*) получится при взаимодействии 5,8г ацетона с 11,2л водорода?

Answer 1

дано
p(CH3-CH(OH) - CH3) = 0.8 g/cm3
m(CH3-CO-CH3) = 5.8 g
V(H2) = 11.2 L
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V(CH3CH(OH)CH3)-?

M(CH3C(O)CH3) = 58 g/mol
n(CH3C(O)CH3) = m/M = 5.8 / 58 = 0.1 mol
n(H2) = V/Vm  = 11.2 / 22.4 = 0.5 mol
n(CH3C(O)CH3) < n(H2)

CH3-C(O)-CH3 + H2-->CH3-CH(OH) - CH3
n(CH3-C(O)-CH3) = n(CH3-CH(OH)-CH3) = 0.1 mol
M(CH3-CH(OH)-CH3) = 60 g/mol
m(CH3CH(OH)CH3) = n*M =0.1*60 = 6 g
V(CH3CH(OH)CH3) = m(CH3CH(OH)CH3)/pCH3CH(OH)CH3) = 6/0.8 = 7.5L
ответ 7.5 л