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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 ?

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 ?

A. 0.2
B. 0.1
C. 0.4
D. 0.6

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 ? Read More »

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. Mole fraction of water vapour in the product gases is about_____________________?

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. Mole fraction of water vapour in the product gases is about_____________________?

A. 0.19
B. 0.33
C. 0.40
D. 0.67

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_____________________? Read More »

Stoichiometry

At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature?

Stoichiometry /
At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature?

A. Increases
B. Decreases
C. Remains unchanged
D. Increases linearly

At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature? Read More »

Stoichiometry

For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ?

Stoichiometry /
For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ?

A. Dry bulb temperature
B. Wet bulb temperature
C. Humidity
D. Relative saturation

For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ? Read More »

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 ?

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 ?

A. 17
B. 20
C. 25
D. 34

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 ? Read More »

Stoichiometry

The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight?

Stoichiometry /
The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight?

A. Increases
B. Decreases
C. Remains unchanged
D. Increases linearly

The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight? Read More »

Stoichiometry