Stoichiometry The heat evolved in the combustion of benzene is represented by the equation: C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole. +1632.3 -2448.45 -1632.3 +816.15 +1632.3 -2448.45 -1632.3 +816.15 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is 2 1 3 2 1 3 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry With increase in temperature, the surface tension of water Increases Remains constant Increases linearly Decreases Increases Remains constant Increases linearly Decreases ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0⁻⁵m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10⁻³. The rate of evaporation of aniline is 2.97 x 10⁻⁴. Its units are Mole/cm². s Mole/m² . s Mole/s Kmole/m² . s Mole/cm². s Mole/m² . s Mole/s Kmole/m² . s ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight. Increases Decreases Remains unchanged Either A or B; depends on the liquid Increases Decreases Remains unchanged Either A or B; depends on the liquid ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry A 'limiting reactant' is the one, which decides the __________ in the chemical reacation. Equilibrium constant None of these Conversion Rate constant Equilibrium constant None of these Conversion Rate constant ANSWER DOWNLOAD EXAMIANS APP
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