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Stoichiometry

Stoichiometry
1 kg/cm² is equal to

1 metre of water column
760 torr
1KPa
10 metres of water column

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Stoichiometry
Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the

Recirculation
Purging
Bypassing
Recycling

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Stoichiometry
Heat of transition is the heat evolved or absorbed, when a substance is converted from

Vapor to liquid
Vapor to solid
One allotropic form to another allotropic form
Solid to liquid

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Stoichiometry
A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)

485
350
345
140

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Stoichiometry
The heats of vaporisation of CS₂, C₂H₅OH &H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

CS₂ > H₂O > C₂H₅OH
H₂O > CS₂ > C₂H₅OH
H₂O > C₂H₅OH > CS₂
CS₂ > C₂H₅OH > H₂O

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Stoichiometry
The latent heat of vaporisation

Becomes zero at the critical point
Decreases with increased temperature
All of these
Decreases as pressure increases

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