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Stoichiometry

Stoichiometry
The quantity of heat required to evaporate 1 kg of a saturated liquid is called

1 Kcal
Latent heat
Sensible heat
Specific heat

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Stoichiometry
A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be

5 kmole/hr
6 kmole/hr
4 kmole/hr
3 kmole/hr

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Stoichiometry
Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.

Bisulphite
Carbonate (monohydrate)
Chloride
Thiosulphate

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Stoichiometry
S.T.P. corresponds to

760 mm Hg gauge pressure & 15.5°C
101.325 kPa gauge pressure & 15.5°C
1 atm. absolute pressure & 15.5°C
760 torr & 0°C

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Stoichiometry
Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).

°API = 145 - (145/G)
°API = (141.5/G) - 131.5
°API = (140/G) - 130
°API = 200(G - 1)

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Stoichiometry
The osmotic pressure of a solution is directly proportional to the

All of these
Lowering of vapor pressure
Absolute temperature of a given concentration
Molecular concentration of the solute

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