The total volume (in L) of gaseous products, measured at 350°C and 735 torr, when an automobile engine burns 100. g of C₈H₁₈ is 46.35 L.
Calculation ,
According to ideal gas law ,
PV = nRT
Where P is the pressure of gaseous products = 735 torr
V is the total volume of gaseous products = ?
n is the number of moles of gaseous products = given mass/molar mass
number of moles of gaseous products ( n ) = 100g / 114 g/mol = 0.877 mol
R is the universal gas constant of gaseous products = 62.36 L.torr/K.mol
T is the temperature of gaseous products = 350°C = 350 + 273 = 623K
Putting the value of P , n ,R and T in equation ( i ) we get the volume of gaseous products .
735 torr×V = 0.877 mol× 62.36 L.torr/K.mol× 623K
V = 0.877 mol× 62.36 L.torr/K.mol× 623K/735 torr = 46.35 L
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