Stoichiometry

Stoichiometry
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.?

0.2

0.1

0.4

0.6

0.2

0.1

0.4

0.6

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Stoichiometry
Vapor pressure of water at 100°C is about __________ bar.

101.3

0.1013

10.13

1.013

101.3

0.1013

10.13

1.013

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Stoichiometry
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. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

1225

1525

1335

1735

1225

1525

1335

1735

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Stoichiometry
The unit of dynamic viscosity is

Both B & C

Gm/cm sec

Stoke

Poise

Both B & C

Gm/cm sec

Stoke

Poise

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Stoichiometry
A vessel of volume 1000 m³ contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately

25

17

34

20

25

17

34

20

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Stoichiometry
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

1 - (x1/x2)

X1/x2

X2/x1

1/x2

1 - (x1/x2)

X1/x2

X2/x1

1/x2

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