Chemical Engineering :: Stoichiometry
- A solution with reasonably permanent pH is called a/an __________ solution.
- A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct?
- A very dilute solution is prepared by dissolving 'x1' mole of solute in 'x2' mole of a solvent. The mole fraction of solute is approximately equal to
- Heat of solution in a system in which both solute and solvent are liquids is termed as
- Mass number of an atom is the sum of the numbers of
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At standard conditions,
N₂ + 2O₂ ⇋ 2NO₂; ΔG° = 100 kJ/mole
NO + ½O₂ ⇋ 2NO₂; ΔG° = -35 kJ/mole
The standard free energy of formation of NO in kJ/mole is - Pick out the wrong statement:
- The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.
- 1 gm mole of methane (CH₄) contains
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A.
The integral heat of solution of either components can not be calculated from heat of mixing data |
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B.
The average value of heat of neutralisation of dilute solutions of weak acids and bases is much less compared to that for strong acids and bases |
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C.
The standard heat of solution of the hydrate of a substance is the difference between the heat of solution of the anhydrous substance and its heat of hydration |
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D.
The accompanying enthalpy change, when a solute is dissolved in solvent, depends upon the nature & amount of the solute & the solvent, on the temperature & on the initial & final conce |