The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
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Chemical Engineering · all questionsStoichiometry
Stoichiometry
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Equal masses of CH4 and H2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is
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The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour
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An ideal gas can be liquified, because
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The value of the gas-law constant 'R' is 1.987
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Volume occupied by one gm mole of a gas at S.T.P. is
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The number of H+ in 1 c.c solution of pH 13 is
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The density of a liquid is 1500 kg/m3. Its value in gin/litre will be equal to
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One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = -730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about
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The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies
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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 0.74 × 10-5 m2/s.The numerical value of mass transfer co-efficient is 7.4 × 10-3. The rate of evaporation of aniline is 2.97 × 10-4. Its units are
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A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
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One Newton is equal to __________ dynes.
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Pick out the wrong statement.
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The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?
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The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
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The heat change for the reaction, C(s) + 2S(s) → CS2(), is 104.2 kJ. It represents the heat of
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Which of the following is not used for computing latent heat of vaporisation?
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The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface. This statement pertaining to the solubility of gases in liquid is the __________ law.
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2 litres of nitrogen at N.T.P. weighs __________ gms.
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